A shotgun, rifle, ammunition and other items were stolen from an unmarked San Mateo County Sheriff's Department vehicle in San Francisco on Friday night, according to officials.
The unmarked vehicle was stationed along the 100 block of Jones Street in the Tenderloin District when it was broken into just after 10 p.m., according to San Francisco police.
A Kevlar vest and FBI jacket were also stolen from the vehicle, police said.
The car was assigned to a San Mateo County sheriff's sergeant who is a member of the Bay Area’s FBI task force, according to a sheriff's department official.
A sheriff's spokesman listed the stolen weapons and ammunition: "So the first is going to be a shotgun with a Weatherby 12-gauge pump action, blue steel with a brown stock. The second is a Colt AR4, black in color. There were also 40 mags containing 20 rounds each of .223 that were stolen."
The guns were locked in the trunk of the car, but the thief or thieves managed to break a window and escape with the items, according to a sheriff's spokesman.
It was not clear whether the deputy was in the city as part of an investigation.
While examining Bay Area police agency records, the NBC Bay Area Investigate Unit found that the San Mateo County Sheriff's Department reported that 58 guns were lost or stolen during a five-year time period ending in 2015.
A new law requires that law enforcement officers secure their weapons in a locked trunks or a safe box in their vehicles.
Anyone with information regarding the recent incident is encouraged to call the San Francisco Police Department's tip line at 415-575-4444.