A gunman in suburban Denver opened fire on sheriff’s deputies responding to a report of a domestic dispute early Sunday morning, killing one officer and wounding four others while striking two civilians in a barrage of gunfire. The suspect, who was shot and killed, has been identified as 37-year-old Matthew Riehl.

The deputies were called to a residence around 5:20 a.m. Sunday morning where they were immediately met with gunfire from the suspect, Douglas County Sheriff Tony Spurlock said in a news conference Sunday.

The two civilians also suffered non-life threatening injuries, Spurlock said. The unidentified suspect, who was killed in the exchange, was known to police but he did not have a criminal history. Spurlock said the suspect wielded a rifle and fired more than 100 rounds in the encounter.

Zackari Parrish, 29, was identified as the deputy killed in the shooting. Parrish joined the force seven months ago. He is survived by his wife and two children. Spurlock said he sat with Parrish’s wife and “could see in her eyes that her life was over.”

The wounded officers were identified as Mike Doyle, 28; Taylor Davis, 30; Jeffrey Pelle, 32; and Tom O’Donnell, 31.

The FBI office in Denver said it was ready to provide its “full support” to the Douglas County Sheriff’s Office.