Security patrols here arrested three persons for stealing cars. The three were rounded up from a western district of the capital city. An official source at Riyadh Police said a security patrol saw a man dismantling a tire late at night. The man fled when he saw the patrol approaching. The man, who was overpowered after a hectic chase, admitted under interrogation that the car was stolen. He also gave the whereabouts of his two accomplices.