Authorities have taken the entire family of the Boulder fire attack suspect into Immigration and Customs Enforcement (ICE) custody to determine how much they knew about his plans, a tweet from ICE Kristi Noem, Secretary of Homeland Security said in a post on X Tuesday.

Mohamed Soliman was arrested Sunday after he allegedly carried out his ‘targeted attack’ on a group walking in support of Israeli hostages in Boulder, Colorado. He threw molotov cocktails that burned multiple victims while screaming “Free Palestine,” Newsweek previously reported.

“Today, @DHSgov and @ICEGov are taking the family of suspected Boulder, Colorado terrorist, and illegal alien, Mohamed Soliman, into ICE custody,” Noem said on X, adding “This terrorist will be prosecuted to the fullest extent of the law. We are investigating to what extent his family knew about this.”

This is a breaking news story and will be updated as more information becomes available.