(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.

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