A Kern County sheriff’s deputy was fatally shot this weekend when his SWAT team tried to rescue people held hostage inside a home by a man armed with an AK-47-style rifle and a handgun, authorities said Monday. Four other people were also killed in the shootout.

Three people inside the home, reported to be the gunman’s sons and their mother — were fatally shot during the standoff Sunday afternoon in the city of Wasco, northwest of Bakersfield. Deputies shot and killed the suspect after he climbed onto the home’s roof and began shooting.

Five Year Veteran of Sheriff’s Office

Kern County Sheriff Donny Youngblood identified the slain deputy as Phillip Campas. Campas, 35, was a five-year veteran of the sheriff’s office and had previously served as a sergeant in the U.S. Marines in Afghanistan. He was an instructor at the academy, as well as a member of the sheriff’s SWAT team and the honor guard.

Campas is survived by his wife and two young children.

The violence began with a 911 call that had an open line into the home, Youngblood said. The activity heard on the call led deputies to believe at least one person was still alive inside the home.

Deputy Dizander Guerrero was wounded by gunfire and two deputies were struck by shrapnel during the violence.

Suspect Under Restraining Order

Two women and two girls were able to escape the home safely, Youngblood said. Their relationship to the shooter and the other victims was not immediately clear.

The 41-year-old suspect has not yet been named publicly but Youngblood said there was a restraining order filed against him that prohibited him from having firearms. The victims inside the home — only described as the gunman’s 17- and 24-year-old sons and their 42-year-old mother — also have not been named publicly.