One federal contract security officer was killed and another was injured in the shooting on Friday night.

A federal contract security officer was killed and another injured in a shooting outside the US courthouse in Oakland, the FBI said on Saturday.

A vehicle pulled up outside the Ronald V Dellums Federal Building at about 9:45pm on Friday and someone opened fire at the contract security officers who worked for the Federal Protective Service of the Department of Homeland Security, authorities said.

The shooting happened less than a half-mile from the Oakland police headquarters where demonstrators gathered to protest against the police killing of George Floyd in Minnesota.