Now playing
01:46
Feds arrest 6 Americans in terror sting
isis behind the mask youth recruitment_00002525.jpg
isis behind the mask youth recruitment_00002525.jpg
Now playing
01:40
When typical teens find radical Islam
jihotties isis recruiting brides todd dnt tsr_00000501.jpg
PHOTO: Tumblr
jihotties isis recruiting brides todd dnt tsr_00000501.jpg
Now playing
02:20
ISIS using 'jihotties' to recruit brides for fighters
pkg paton walsh isis children _00024316.jpg
pkg paton walsh isis children _00024316.jpg
Now playing
02:47
ISIS targets the minds of young children
Istanbul attackers are believed to be ISIS members from Dagestan, Uzbekistan, and Kyrgyzstan. Are those countries significant suppliers of ISIS recruits?
PHOTO: ISIS
Istanbul attackers are believed to be ISIS members from Dagestan, Uzbekistan, and Kyrgyzstan. Are those countries significant suppliers of ISIS recruits?
Now playing
02:15
Istanbul attackers connected to Central Asia
brussels jihadi recruitment network mclaughlin pkg_00005025.jpg
brussels jihadi recruitment network mclaughlin pkg_00005025.jpg
Now playing
03:13
Inside Brussels' jihadi recruitment network
jihad 101 elbagir pkg_00023903.jpg
jihad 101 elbagir pkg_00023903.jpg
Now playing
03:49
Jihadi 101: The books at the core of ISIS recruitment
PHOTO: ISIS/Raqqa is Being Slaughtered Silently
Now playing
03:16
ISIS videos show children training to kill
ISIS using child soldiers pkg Walker_00013810.jpg
PHOTO: Kurdistan 24
ISIS using child soldiers pkg Walker_00013810.jpg
Now playing
04:54
ISIS using child soldiers to carry out atrocities
Kashmiri demonstrators hold up a flag of the Islamic State of Iraq and the Levant (ISIL) during a demonstration against Israeli military operations in Gaza, in downtown Srinagar on July 18, 2014. The death toll in Gaza hit 265 as Israel pressed a ground offensive on the 11th day of an assault aimed at stamping out rocket fire, medics said. AFP PHOTO/Tauseef MUSTAFA (Photo credit should read TAUSEEF MUSTAFA/AFP/Getty Images)
PHOTO: TAUSEEF MUSTAFA/AFP/Getty Images
Kashmiri demonstrators hold up a flag of the Islamic State of Iraq and the Levant (ISIL) during a demonstration against Israeli military operations in Gaza, in downtown Srinagar on July 18, 2014. The death toll in Gaza hit 265 as Israel pressed a ground offensive on the 11th day of an assault aimed at stamping out rocket fire, medics said. AFP PHOTO/Tauseef MUSTAFA (Photo credit should read TAUSEEF MUSTAFA/AFP/Getty Images)
Now playing
02:33
ISIS sympathizers inside U.S. a growing concern
teen rescued from isis karadsheh_00001310.jpg
teen rescued from isis karadsheh_00001310.jpg
Now playing
03:12
Teen rescued from ISIS
iraq isis child soldiers elbagir pkg_00004001.jpg
PHOTO: ISIS
iraq isis child soldiers elbagir pkg_00004001.jpg
Now playing
03:47
The children who escaped the clutches of ISIS
isis child soldiers 2 pkg elbagir amanpour _00011419.jpg
isis child soldiers 2 pkg elbagir amanpour _00011419.jpg
Now playing
04:07
Children beaten, killed who refuse to join ISIS
families of isis members intv tsr_00004916.jpg
PHOTO: Emily Kassie/The Huffington Post
families of isis members intv tsr_00004916.jpg
Now playing
01:47
Mothers speak out about their children joining ISIS
fbi warning american female isis fighters brown dnt tsr _00021217.jpg
fbi warning american female isis fighters brown dnt tsr _00021217.jpg
Now playing
02:13
FBI: More women in the U.S. are joining ISIS
Members of Iraqi paramilitary Popular Mobilisation units, which are dominated by Shiite militias, celebrate with a flag of the Islamic State (IS) group after retaking the village of Albu Ajil, near the city of Tikrit, from the jihadist group, on March 9, 2015.
PHOTO: AHMAD AL-RUBAYE/AFP/Getty Images
Members of Iraqi paramilitary Popular Mobilisation units, which are dominated by Shiite militias, celebrate with a flag of the Islamic State (IS) group after retaking the village of Albu Ajil, near the city of Tikrit, from the jihadist group, on March 9, 2015.
Now playing
02:52
Report: Two pilots may have been influenced by ISIS

Story highlights

Six young Minnesotans conspired to sneak into Syria and join ISIS "by any means necessary," prosecutors say

The men, ages 19 to 21, were arrested Sunday

They plotted for 10 months, the U.S. attorney for the District of Minnesota says

(CNN) —  

A group of six young Minnesota men conspired to sneak into Syria and join ISIS “by any means necessary,” federal prosecutors said Monday.

The group of friends, ages 19 to 21, were arrested Sunday.

“What’s remarkable about this case was that nothing stopped these defendants from plotting their goal,” said U.S. Attorney Andrew M. Luger of the District of Minnesota.

“They were not confused young men. They were not easily influenced. These are focused men who are (were?) intent on joining a terrorist organization by any means possible.”

Recruiting for the ISIS terrorist network is a particular problem in Minnesota’s community of Somali immigrants.

’Peer-to-peer recruiting’

“People often ask who is doing the recruiting and when will we catch the person responsible,” Luger said. “But it is not that simple. In today’s case the answer is that this group of friends is recruiting each other. They’re engaged in what we describe as peer-to-peer recruiting.”

Zacharia Yusuf Abdurahman, 19, Adnan Farah, 19, Hanad Mustafe Musse, 19, and Guled Ali Omar, 20, were arrested in Minneapolis. Abdirahman Yasin Daud, 21, and Mohamed Abdihamid Farah, 21, were arrested in San Diego after driving there in hopes of crossing into Mexico, Luger said.

The men spent ten months plotting, Luger said. “Even when their co-conspirators were caught and charged, they continued to seek new and creative ways to leave Minnesota to fight for a terror group.”

One breaks from the group

Another friend, who was part of the group, changed his mind and became a cooperating witness for the FBI, even tape recording some meetings, Luger said.

The FBI investigation has previously netted Abdullahi Yusuf, who has pleaded guilty to conspiring to provide material support to ISIS, and Hamza Ahmed, who has been indicted on charges of conspiring and attempting to provid e material support to ISIS and is currently pending trial, according to the criminal complaint.

The complaint describes a man, identified only as “Nur,” who has spent time in Syria and allegedly helped the six accused men.

All six of the men who were arrested appeared in federal court on Monday but did not enter pleas.

A detention hearing was scheduled for Wednesday for the men in custody in Minnesota and Friday for those in California.

Prosecutors will seek to have Farah and Daud moved to Minnesota for the case.

CNN’s Tony Marco and Joshua Berlinger contributed to this report.