Suspect arrested after explosive devices sent to Trump critics and CNN

Arizona Republican Sen. Jeff Flake tells CNN's Chris Cuomo that if President Donald Trump "were to take a more civil tone, it would make a difference," adding that he "hopes that he does."

Flakes' comments were outside the Time Warner Center in New York, where CNN's offices are located. The building was evacuated earlier Wednesday after a bomb was sent to its address.

The bomb delivered to the Time Warner Center was one of several suspicious packages that were sent to various political figures, but intercepted on Wednesday.

Flake, who is not running for re-election, has been a harsh Republican critic of Trump.

Watch:

CNN President Jeff Zucker released a statement calling out President Donald Trump and White House Press Secretary Sarah Sanders.

The Miami-Dade Police Department tells CNN that their bomb squad unit will be responding to a suspicious package that was addressed to Rep. Debbie Wasserman-Schultz.

The Aventura Police Department said they were investigating the package out of "an abundance of caution."

Rep. Maxine Waters said her Washington DC office was the target of a suspicious package. The incident has since been referred to the FBI.

Two law enforcement officials tell CNN that the package addressed to Waters had similarities to the other suspicious packages. One source said that belief was based on the timing, packaging and devices inside the packages. 

It was not clear if it was capable of exploding.

CNN crews in Sunrise, Florida, spotted a robot moving outside of Rep. Debbie Wasserman-Schultz's office earlier today.

The congresswoman's office was evacuated after a suspicious package was mailed there this morning.

Two law enforcement sources tell CNN that the package was addressed to former Attorney General Eric Holder. It was returned to the Democratic congresswoman because that was the return label on the package, the sources said, adding that it was the same return address for the packages sent to Obama and Clinton.

WATCH:

The Time Warner Center in New York City, which had been evacuated earlier, has reopened and personnel is being allowed back in the building.

"The NYPD has concluded its security sweep, and it is now safe to return to the building," CNN President Jeff Zucker said in a company-wide email. "I so appreciate your patience, as I know what a long day this has been for all of you."

Watch as CNN's Chris Cuomo describes the scene:

The package addressed to Rep. Maxine Waters had similarities to the other suspicious packages, according to two law enforcement sources.

One source said that belief was based on the timing, packaging and devices inside the packages. It was not clear if it was capable of exploding.

Wisconsin Gov. Scott Walker responded to the "attempted terrorist act" in a tweet on Wednesday afternoon, hours ahead of a campaign rally where President Donald Trump is set to join him.

Retired FBI Special Agent and bomb technician Jim Maxwell said that even rudimentary and crudely made pipe bombs, such as those sent to political figures and CNN's New York office today, can still be extremely dangerous and fatal.

For example, the Tsarnaev brothers carried out the Boston Marathon bombings using bombs partly made from fireworks to create an explosion.

"These types of devices, if they go off, can wreak a lot of havoc," he said.

Watch: