A 32-year-old man was shot and killed by a King County sheriff’s deputy responding to an alleged domestic violence incident in Auburn Saturday afternoon, authorities said.

The man was declared dead at the scene.

Sgt. Ryan Abbott, a spokesperson for the Sheriffs Office, said the deputy had been getting his car washed on Auburn Way South when he was flagged down by someone who said a domestic violence disturbance was taking place at a nearby home, and that a man was firing a gun in the back yard.

“The deputy pulled up around the corner, in front of the house,” Abbott said, where he spoke to a woman outside. Soon afterward, a man also came out of the house. “There was some type of altercation with the male,” Abbott said, “and that’s when the shots were fired.”

The deputy performed emergency first aid on the man, as did medics who arrived on the scene shortly thereafter, Abbott said.

“I don’t have the details about what the altercation looked like,” he added. “We just know something happened. We don’t know what.”

The deputy was placed on administrative leave, which is standard procedure in officer-involved shootings, a statement from the King County Sheriff’s Office said.

The Valley Investigation Team — a multiagency unit of detectives and crime-scene technicians from the Auburn, Des Moines, Federal Way, Kent, Tukwila, Renton and Port of Seattle police departments — will conduct the investigation.