A car has been hijacked from a car park and then crashed into a bollard in Bangor.
A man was in his Peugeot car was in Bingham Lane at around 10pm on Thursday when he was approached and ordered out of the vehicle by a man thought to be armed with a handgun.
The hijacker made off in the car, driving down a pedestrian walkway before colliding with a bollard.
He ran from the car, accompanied by a number of other men who were running behind the car.
Police arrested four men a short time later and they remain in police custody.