Adding to a growing concern over missing police weapons, an MP5 sub-machine gun was stolen from an FBI agent’s car somewhere in Contra Costa County earlier this month, the FBI announced Friday.

The agency is asking for the public’s help in recovering the H&K 10-mm weapon. It was stolen sometime between 6 p.m. Jan. 8 and 10 a.m. Jan. 9 when the car was in Concord, Orinda or Lafayette, the FBI said in a statement.

The Contra Costa County Sheriff’s Office is assisting in the search for the gun. An ammunition clip fitting the gun and a ballistics vest were also stolen. The FBI asks that anyone with information call 415-533-7400 or visit tips.fbi.gov.

It was unclear how the weapon was stored in the agent’s car. Further details about the theft were not released.

At least four FBI weapons — all hand guns — were stolen from FBI vehicles in the Bay Area in 2016, including a high-profile theft in San Francisco over Memorial Day Weekend. That weapon was recovered.

They were among 944 guns that a Bay Area News Group investigation found had been lost or stolen from Bay Area, state and federal law enforcement agencies since 2010. Many had been left in backpacks and duffel bags left in cars or shoved under car seats.

Last year, Gov. Jerry Brown signed legislation requiring law enforcement officers lock weapons left in parked vehicles inside secure compartments. The new law applies to federal law enforcement in California, but it isn’t clear whether the missing FBI weapon had been secured.

The law came in response to a pair of high-profile killings with stolen police weapons in the Bay Area, including the July 2015 shooting death of Kate Steinle on a pier in San Francisco.

Earlier this month, a federal judge in San Francisco ruled a lawsuit by Steinle’s family against the U.S Bureau of Land Management could go forward. A bureau ranger, the judge ruled, had created a risk by leaving the gun vulnerable to being stolen and had “a duty to better secure the handgun against theft.”