The man who authorities say firebombed a group in Boulder, Colorado, demonstrating for the release of Israeli hostages, has been charged in state court with over 100 counts, including attempted murder and assault.

The FBI and the U.S. Department of Homeland Security has issued an alert after violent attacks on Jewish and Israeli communities. Incidents in Colorado and Washington D.C. have prompted federal warnings about rising threats of violence linked to the Israel-Hamas conflict.

The suspect in a Molotov cocktail attack on a Jewish protest march in Colorado appeared in court Thursday facing more than 100 charges over an incident that injured 15 people.Mohamed Sabry Soliman is alleged to have thrown firebombs and sprayed burning gasoline at a group of people who had gathered Sunday in support of Israeli hostages held by Hamas.

The attacks in the U.S. come as U.N. officials and aid groups warn that the situation in Gaza has become increasingly dire.

Mohammed Sabry Soliman is charged with hate crime after a Molotov cocktail attack at a pro-Israel rally Sunday in Boulder, Colorado, injuring eight people. He is accused of shouting "Free Palestine!" while throwing the Molotov cocktails.