Video captured by a neighbor appears to show a man at a home on 96th Street tossing a burning object onto the ground near the patrol car. Seconds later, the object exploded in a bright flash. Neighbors several blocks away reported hearing the boom. The Mesa Police Department later posted a photo of the damaged patrol car on social media.

Police detained three people at the scene, including Daniel Simmons, 73, who lives at the home. Simmons said the other two detained were his friends and that he was in bed when the explosion occurred. “I didn’t see it. I just heard the big boom,” Simmons said. “The others said it blew a cop car all to hell.”

Late Thursday, police announced that two men—Christopher Byasse, 58, and Christopher Jones, 55—were being booked into the Maricopa County Detention Center. Byasse is expected to face felony charges including aggravated assault on a law enforcement officer and arson. Jones is expected to be charged with arson and criminal damage. Both are expected to appear in court on Friday.

Across the street, neighbors described a chaotic scene as police cars filled the street. Larry Martinez, who shared the video with a local news outlet, said fireworks are common in the neighborhood but this was different. “My shades were closed, but I still saw the brightness,” Martinez said. “I said, ‘What the hell? That can’t be a firecracker.’”

Randy Meyer, who has lived on the street for 30 years, said heavy police activity in the area has become more frequent. “It’s become more and more of a regularity,” Meyer said. “I’ve seen it probably three or four times in the last year.”

The incident remains under investigation. Anyone with information is asked to contact the Mesa Police Department.