A man shouted, “Free Palestine” and used a “makeshift flamethrower” during an attack in Boulder, Colorado, that injured eight people marching to bring awareness of Israeli hostages held by Hamas, officials said.

Axar.az, citing NBC, reports that FBI Special Agent Mark Michalek said this at a press conference.

The suspect was identified as Mohamed Sabry Soliman, 45, of El Paso County, Colorado. He was taken into custody at the scene. The assault was being investigated as an act of terrorism, he said.

He added that it’s too early to say whether the group supporting the release of hostages was specifically targeted. “It’s way too early to speculate motive,” Boulder Police Chief Stephen Redfearn said.

The injured, four men and four women, are between 52 and 88 years old, a Boulder Police spokesperson said Sunday night. Michalek earlier said six people were hurt and described the worst as being in critical condition; Boulder Police Chief Stephen Redfearn earlier said the rest had minor injuries.

They were at or near a weekly demonstration to support awareness of Israeli hostages still held in Gaza by Hamas militants, officials said.

The group Run for Their Lives — Boulder has been holding the demonstrations fairly regularly, sometimes weekly, following the Oct. 7, 2023, Hamas attack on Israel, the group has said.