BOULDER, Colo. -- A man accused of attacking a pro-Israel demonstration advocating for the release of hostages held in Gaza pleaded not guilty to 184 state charges during his arraignment in state court Wednesday.

Mohamed Soliman, 45, is accused of using a "makeshift flamethrower" and throwing an incendiary device into a crowd of people participating in a Run for Their Lives walk at a pedestrian mall in Boulder, Colorado in June, according to the FBI.

An 82-year-old Holocaust survivor died in the wake of the attack , while at least 15 people were injured.

Soliman allegedly told investigators he "specifically targeted" the Run for Their Lives walk after learning about the group in an online search, according to court documents.

The 184 state charges against Soliman include first-deg

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