(USATODAY) - A San Francisco Bay transit officer was accidentally shot and killed by a colleague Tuesday as they searched a suspect's apartment to serve a warrant, officials said.
The Bay Area Rapid Transit officer was the first killed in the line of duty in the department's 42-year history, said BART Police Chief Kenton Rainey.
The identifies of both officers were not immediately released.
Rainey said the two were "following up on a crime committed on BART property" and conducting a probation search at a complex in the East Bay city of Dublin about 1 p.m. PT (4 p.m. ET). One officer's gun discharged accidentally, striking the other officer. He was transported to a local hospital, where he died of his wounds.
Rainey did not say where the officer was hit.
Alameda County Sheriff's Sgt. J.D. Nelson told reporters that the sought-after suspect had committed various crimes, including robberies, but was not home.
"The entire BART organization is deeply saddened by this tragic event and we ask the public to keep the officer's family in its thoughts and prayers," said a statement from Rainey and General Manager Grace Crunican.