Sawn-off gun seized after Adelaide chase

A sawn-off shotgun has been seized from a 22-year-old man who led police on a wild car chase through Adelaide's western suburbs.

Police tried to stop the man about 1.30am on Sunday at a drug and alcohol testing station but he drove through, sparking the chase.

The car kept driving after two tyres were punctured by police-laid road spikes before it crashed into a patrol car.

The man got out, ran off jumping fences and onto the roof of a house at Croydon but was eventually brought down by police dog Iggy.

The Murray Bridge man was arrested and charged with multiple offences including dangerous driving to evade police and firearms offences.