The FBI seal is attached to a podium prior to Director is Christopher A. Wray speaking at a news conference at FBI Headquarters, on June 14, 2018 in Washington, DC.
The FBI seal is attached to a podium prior to Director is Christopher A. Wray speaking at a news conference at FBI Headquarters, on June 14, 2018 in Washington, DC.
PHOTO: Mark Wilson/Getty Images
Now playing
02:01
How authorities discovered alleged white supremacist
banon wayne split
banon wayne split
PHOTO: Getty Images
Now playing
02:00
Trump pardons 73 people, commutes sentences of 70 others
WASHINGTON, DC - JANUARY 17: The U.S. Capitol dome is seen beyond a security fence on January 17, 2021 in Washington, DC. After last week
WASHINGTON, DC - JANUARY 17: The U.S. Capitol dome is seen beyond a security fence on January 17, 2021 in Washington, DC. After last week's riots at the U.S. Capitol Building, the FBI has warned of additional threats in the nation's capital and in all 50 states. According to reports, as many as 25,000 National Guard soldiers will be guarding the city as preparations are made for the inauguration of Joe Biden as the 46th U.S. President. (Photo by Michael M. Santiago/Getty Images)
PHOTO: Michael M. Santiago/Getty Images
Now playing
01:15
12 Army National Guard members removed from inauguration duty
PHOTO: Pool/Getty Images
Now playing
02:04
Mitch McConnell: Capitol rioters were fed lies
Now playing
01:47
CNN explains why Biden's flight to DC is so unusual
Now playing
04:44
CNBC host reveals why he left Fox News
WASHINGTON, DC - JANUARY 16: National Guard troops march by security fencing near the U.S. Capitol on January 16, 2021 in Washington, DC. After last week
WASHINGTON, DC - JANUARY 16: National Guard troops march by security fencing near the U.S. Capitol on January 16, 2021 in Washington, DC. After last week's riots at the U.S. Capitol Building, the FBI has warned of additional threats in the nation's capital and in all 50 states. According to reports, as many as 25,000 National Guard soldiers will be guarding the city as preparations are made for the inauguration of Joe Biden as the 46th U.S. President. (Photo by Eric Thayer/Getty Images)
PHOTO: Eric Thayer/Getty Images
Now playing
01:49
Two Army National Guard members removed from inauguration duty
trump farewell message
trump farewell message
PHOTO: White House Photo
Now playing
03:18
Trump offers 'best wishes' to new administration in farewell address
An 18-year-old college student from Georgia has been sentenced to four months in prison in the Cayman Islands after breaking the British Caribbean territoryís Covid-19 protocol while visiting her boyfriend for a jet skiing competition, according to her family.
An 18-year-old college student from Georgia has been sentenced to four months in prison in the Cayman Islands after breaking the British Caribbean territoryís Covid-19 protocol while visiting her boyfriend for a jet skiing competition, according to her family.
PHOTO: Courtesy Jeanne Mack
Now playing
01:16
Teen jailed for breaking Covid quarantine speaks out
daily weather forecast california fire threat strong winds snow_00003520.png
daily weather forecast california fire threat strong winds snow_00003520.png
Now playing
02:07
Severe wind event promps fire threat in California
This screen grab from a Zoom call shows New York Mets general manager Jared Porter Monday, Dec. 14, 2020. Mets general manager Jared Porter sent graphic, uninvited text messages and images to a female reporter in 2016 when he was working for the Chicago Cubs in their front office, ESPN reported Monday night, Jan. 18, 2021.
This screen grab from a Zoom call shows New York Mets general manager Jared Porter Monday, Dec. 14, 2020. Mets general manager Jared Porter sent graphic, uninvited text messages and images to a female reporter in 2016 when he was working for the Chicago Cubs in their front office, ESPN reported Monday night, Jan. 18, 2021.
PHOTO: AP
Now playing
01:08
NY Mets fire GM after he reportedly sent explicit pictures to female reporter In 2016
McCarthy
McCarthy
PHOTO: CNN
Now playing
01:40
'Far too close:' Army secretary reveals sobering details on riot
US President Donald Trump waves to the media as he makes his way to board Air Force One before departing from Andrews Air Force Base in Maryland on January 12, 2021. - Trump is traveling to Texas to review his border wall project. (Photo by MANDEL NGAN / AFP) (Photo by MANDEL NGAN/AFP via Getty Images)
US President Donald Trump waves to the media as he makes his way to board Air Force One before departing from Andrews Air Force Base in Maryland on January 12, 2021. - Trump is traveling to Texas to review his border wall project. (Photo by MANDEL NGAN / AFP) (Photo by MANDEL NGAN/AFP via Getty Images)
PHOTO: Mandel Ngan/AFP/Getty Images
Now playing
03:44
Trump mostly in seclusion during final days of presidency
Members of the Michigan Boogaloo Bois an anti-government group stand with their long guns near the Capitol Building in Lansing, Michigan on January 17, 2021, during a nationwide protest called by anti-government and far-right groups supporting US President Donald Trump and his claim of electoral fraud in the November 3 presidential election. - The FBI warned authorities in all 50 states to prepare for armed protests at state capitals in the days leading up to the January 20 presidential inauguration of President-elect Joe Biden. (Photo by SETH HERALD / AFP) (Photo by SETH HERALD/AFP via Getty Images)
Members of the Michigan Boogaloo Bois an anti-government group stand with their long guns near the Capitol Building in Lansing, Michigan on January 17, 2021, during a nationwide protest called by anti-government and far-right groups supporting US President Donald Trump and his claim of electoral fraud in the November 3 presidential election. - The FBI warned authorities in all 50 states to prepare for armed protests at state capitals in the days leading up to the January 20 presidential inauguration of President-elect Joe Biden. (Photo by SETH HERALD / AFP) (Photo by SETH HERALD/AFP via Getty Images)
PHOTO: Seth Herald/AFP/Getty Images
Now playing
04:37
Expert: Social media to extremism is like oxygen to fire
Pharmacist Jason Hyde fills syringes with the Moderna Covid-19 vaccine as first responders wait to receive it at UMass Memorial Hospital in Marlborough, Massachusetts on January 12, 2021. - First Responders started to receive their vaccinations on January 11, as part of the phase one of vaccinations roll out in Massachusetts. (Photo by Joseph Prezioso / AFP) (Photo by JOSEPH PREZIOSO/AFP via Getty Images)
Pharmacist Jason Hyde fills syringes with the Moderna Covid-19 vaccine as first responders wait to receive it at UMass Memorial Hospital in Marlborough, Massachusetts on January 12, 2021. - First Responders started to receive their vaccinations on January 11, as part of the phase one of vaccinations roll out in Massachusetts. (Photo by Joseph Prezioso / AFP) (Photo by JOSEPH PREZIOSO/AFP via Getty Images)
PHOTO: Joseph Prezioso/AFP/Getty Images
Now playing
02:15
CDC warns new Covid-19 variants could accelerate spread in US
PHOTO: @FLOTUS
Now playing
02:51
Watch Melania Trump's farewell speech
UNITED STATES - JANUARY 4: Rep. Lauren Boebert, R-Colo., is seen during a group photo with freshmen members of the House Republican Conference on the House steps of the Capitol on Monday, January 4, 2021. (Photo By Tom Williams/CQ-Roll Call, Inc via Getty Images)
UNITED STATES - JANUARY 4: Rep. Lauren Boebert, R-Colo., is seen during a group photo with freshmen members of the House Republican Conference on the House steps of the Capitol on Monday, January 4, 2021. (Photo By Tom Williams/CQ-Roll Call, Inc via Getty Images)
PHOTO: Tom Williams/CQ-Roll Call, Inc/Getty Images
Now playing
02:49
GOP lawmaker accused of giving 'reconnaissance' tour prior to Capitol riot
(CNN) —  

A 27-year-old man who allegedly espoused white supremacist ideology online was arrested by the FBI and accused of plotting to bomb a synagogue in Colorado.

Richard Holzer had brought a knife and a mask to a motel room and was examining inert pipe bombs prepared by undercover agents moments before he was arrested late Friday, according to a criminal complaint.

Holzer is charged with attempting to obstruct the free exercise of religious beliefs with the attempted use of explosives – a hate crime. In court documents, officials called him a domestic terrorist and described his alleged anti-Semitic ideology and desires for a racial holy war.

According to the complaint, Holzer talked about killing Jews in forums online and shared video of himself casing a synagogue in Pueblo. He described himself as a skinhead, and shared pictures of himself with other social media users with guns and knives alongside white supremacist symbols, the complaint says.

Holzer, according to prosecutors, wrote on one Facebook account: “I wish the Holocaust really did happen …. they need to die.”

Temple Emanuel in Pueblo, Colorado, was allegedly the object of a bomb plot.
Temple Emanuel in Pueblo, Colorado, was allegedly the object of a bomb plot.
PHOTO: KRDO

He also said he paid a “witch doctor” $70 to put arsenic in the water pipes of the synagogue and “hex” the place last year, according to the complaint.

Holzer made his first appearance in Denver federal court on Monday afternoon. A preliminary hearing and a detention hearing are scheduled for Thursday morning, according to US Attorney Jason R. Dunn.

The suspect, who does not yet have an attorney listed on his case, faces a maximum 20-year sentence if convicted of a hate crime, officials said.

How suspect came to FBI’s attention

Domestic terrorism and hate crimes have become a growing concern for law enforcement in recent years as a number of high-profile attacks have left scores dead across the country. Eleven worshippers were killed in October last year when a white supremacist opened fire at the Tree of Life synagogue in Pittsburgh.

Holzer first came on the FBI’s radar after a tip in late September regarding comments he’d made online “of concern indicating a possible threat to the community,” FBI Denver Special Agent in Charge Dean Phillips said at a news conference.

“This case emphasizes our continued efforts to aggressively and promptly address threats to our community to include violence against places of worship. I cannot stress enough the importance of reporting threats in our neighborhoods,” Phillips said.

Undercover FBI agents approached Holzer online soon after the tip and were interacting with him as he allegedly plotted the attack on Temple Emanuel. In a meeting with three undercover agents at a restaurant in Colorado Springs last month, Holzer proposed using Molotov cocktails to destroy the Pueblo synagogue, according to the complaint.

“I want something that tells them they are not welcome in this town,” Holzer allegedly said. “Let’s get that place off the map.”

Temple Emanuel Congregation President Michael Atlas-Acuña told CNN the small Jewish community of about 35 families hasn’t had any similar threats in the past.

“The Pueblo community has embraced the Jewish community and we’ve never had any kind of threats or vandalism or anything like this,” Atlas-Acuña said. Holzer, he said, is a “transplant” and not from Pueblo.

The synagogue has had security guards, though, for the past few years, after shootings in other places, he said, and a sign in front states it isn’t a gun-free zone, Atlas-Acuña said.

“I think it’s stupid for people to put signs up that say this is gun-free zone,” he said. “Like advertising. They’re hitting soft targets and churches, and synagogues are soft targets.”

The temple is 119 years old and on the National Register of Historic Places, Atlas-Acuña said. It’s never been closed for any reason, and services will be held as usual after this week’s threat.

Authorities say they have video evidence

Holzer allegedly visited Temple Emanuel multiple times after he hatched his plot with the undercover agents. On October 19, Holzer sent one agent a video of himself walking around the exterior of the synagogue and “commenting on various features of the building,” the complaint says.

On the night of November 1, Holzer donned a Nazi armband and drove with an undercover agent to a motel. There, he toasted a “move for our race” and commented that the pipe bombs, which authorities said had been prepared with simulated black powder at the FBI lab in Quantico, Virginia, looked “absolutely gorgeous,” according to the complaint.

The FBI arrested him soon afterward and took him to a local police station, where he admitted to planning to blow up the synagogue, the complaint says.

CNN’s Sara Weisfeldt contributed to this report.