A Fullerton firefighter was among those arrested on suspicion of participating in the Huntington Beach riot over the weekend, authorities said Tuesday.

Michael John Lytle, 30, of Anaheim was arrested on suspicion of disorderly conduct and resisting arrest., Fullerton city officials said. He has been placed on administrative leave.

“With firefighters, it’s especially tough because we hold ourselves to such a high standard,” Fullerton Fire Chief Wolfgang Knabe told NBC4.

Also on Tuesday, Chase Scott Christman, 19, of Simi Valley, pleaded not guilty to vandalism and other charges. A Superior Court judge ordered him not to return to Huntington Beach.

Authorities were focusing on a man who was photographed smashing a bike shop display window with a stop sign Sunday as a violent crowd stormed the community after a surfing contest.

Police asked for help identifying the man seen in the image (right) and another in which he appears to be celebrating with arms raised. The photo is one of several used by investigators as they attempt to identify individuals involved in Sunday’s violence along Main Street.