KENNEWICK, Wash. — Three officers fired 17 shots at an unarmed Mexican man in Washington state, and five or six of the bullets hit him in a deadly shooting that has led to weeks of protests and calls for a federal investigation, authorities say.

None of the shots struck former orchard worker Antonio Zambrano-Montes in the back, Kennewick police Sgt. Ken Lattin said Wednesday. Lattin is the spokesman for a regional law enforcement task force investigating the Feb. 10 killing in the nearby agricultural city of Pasco in the southeastern part of the state.

Because full autopsy results are pending, Lattin said at a news conference he couldn’t be more specific about where on Zambrano-Montes’ body the shots struck.

The Mexican immigrant was throwing rocks at passing vehicles and later at responding officers, authorities say. Video taken by a witness shows Zambrano-Montes, 35, running from Pasco officers. As the officers draw closer, he stops, turns and faces them. Multiple pops are heard and then he falls to the ground.

Lattin said officers fired stun guns at least twice but failed to stop Zambrano-Montes before firing their weapons. The officers felt threatened, police said.

Zambrano-Montes’ death at a busy intersection has sparked two weeks of protests in the city where more than half the residents are Hispanic but few are members of the police force or the power structure.

The Franklin County coroner has ordered an inquest into the death, and federal authorities have said they are monitoring the local investigation. It will be thorough and fair, Lattin said.