An indictment unsealed in U.S. District Court in Buffalo on Wednesday charges Hadi Matar with providing material support to Hezbollah, a militant group based in Lebanon and backed by Iran. The indictment didn’t detail what evidence linked Matar to the group.

The federal charge comes after Matar earlier this month rejected an offer by state prosecutors to recommend a shorter prison sentence if he agreed to plead guilty in Chautauqua County Court, where he is charged with attempted murder and assault. The agreement also would have required him to plead guilty to a federal terrorism-related charge, which hadn’t been filed yet at the time.