Aaron Travis Daniels, an Ohio man who was arrested on Monday for allegedly trying to join ISIS in Libya and suspicion of donating funds to the terrorist group, the U.S justice department said.

U.S authorities were investigating Daniels for months and arrested him at the John Glenn Columbus International Airport as he was boarding a plane to Libya “for the purpose of joining ISIS,” the Federal Bureau of Investigation said in a criminal complaint filed in U.S. District Court in Columbus.

The 20-year-old Daniels, also known as Harun Muhammad and Abu Yusuf, admitted to authorities he sent money to ISIS recruiter Abu Issa Al-Amriki through an intermediary and he would have flown to Libya to join the militant group as a fighter.

“He’s accused of paying money that was intended to go to a foreign terrorist organization — in this case [ISIS], and then further, he was accused of attempting to provide himself as a fighter for the group.” U.S. Attorney Benjamin C. Glassman said.

If convicted, Daniels could face up to 20 years in prison and a $250,000 fine. Authorities said they had no reason to believe Daniels was attempting to recruit more fighters for ISIS.