FAIRFIELD - A California Highway Patrol motorcycle officer and another man were struck and killed by a pickup-truck driver during a traffic stop along Interstate 80 in Fairfield on Friday.

The officer was identified as Kirk Griess, who served in the Marine Corps, was a father of three and was a 19-year CHP veteran out of the department’s Solano office.

The other victim was identified as 49-year-old Vallejo resident Jaime Bueza Manuel, CHP officials said.

The driver who plowed into the men was being treated at a local hospital, where he was being interviewed and was cooperating with investigators, CHP officials said. His name was temporarily withheld.

Investigators have not determined what caused him to crash into the men. He was not under arrest, the CHP said.

Story Date: August 13, 2018