The man accused of fire-bombing a Colorado march by people who wanted to raise awareness of hostages in Gaza was charged in state court on Thursday with attempted murder and other crimes, as those he targeted vowed to carry on their efforts.

State prosecutors say Mohamed Soliman, 45, faces nearly 400 years in prison on attempted murder charges in state court. He also faces other state charges. Prosecutors on Wednesday said the number of people injured in the attack rose to 15 ranging in age from 25 to 88. A dog also was injured.

The man suspected of launching a fire attack in Boulder, Colorado, on a group calling for the release of Israeli hostages in Gaza has been charged with two counts of first-degree murder.