(KRON) -- A 15-year-old Oakland boy was arrested Wednesday night after a San Pablo police officer made a traffic stop and located guns in the car, according to the San Pablo Police Department. The San Pablo PD patrol officer witnessed a car that was driving “extremely" recklessly, prompting the traffic stop, police said. During the stop, the officer reportedly noticed the rear passenger acting nervous and moving around. The officer’s attention was then drawn to an extended magazine on the floorboard, which was partially covered by a backpack, according to authorities. Nothing can be done about slow vote counting in Alameda County, supervisor says Inside the backpack, police said they found two unregistered handguns. One of the guns was loaded with a 30-round magazine. (Photo: San Pablo Police Department)(Photo: San Pablo Police Department)(Photo: San Pablo Police Department)(Photo: San Pablo Police Department) The rear passenger, identified as a 15-year-old boy from Oakland, was arrested and brought to the police department. He was later released to his parents, San Pablo PD said.