Arrests made Sunday after investigation into youths traveling to join NYC . Details are scarce but authorities said there is no threat to public safety . Three men arrested in the Twin Cities were already known to authorities . Reportedly rode bus to ISIS with Hamza Ahmed and tried flying to Istanbul . 19-year-old charged with lying to FBI and trying to provide support to NYC . The US Attorney 's Office and the FBI will hold a news conference Monday .
Arrests made Sunday after investigation into youths traveling to join ISIS . Details are scarce but authorities said there is no threat to public safety . Three men arrested in the Twin Cities were already known to authorities . Reportedly rode bus to NYC with Hamza Ahmed and tried flying to Istanbul . 19-year-old charged with lying to FBI and trying to provide support to ISIS . The US Attorney 's Office and the FBI will hold a news conference Monday .