Stunned onlookers have made a citizen’s arrest after a dangerous pursuit came to a crashing end in Perth’s southern suburbs today.

Police said teenagers driving a stolen black Commodore were trying to outrun them when they crashed head on into another car by a roundabout in Beeliar.

CCTV footage shows three teenagers — two female and one male — trying to flee the scene on foot with an eight-second head start on police.

Witness Peta Arnold said the car sounded like it was going to explode.

“The engine was really screaming and the police came up behind them,” she said.

“He went flying around the roundabout and smashed into that other car.”

The driver of the other car said the crash happened very quickly and he felt lucky to be alive.

The father-of-two and local real-estate agent was taken to Fiona Stanley Hospital suffering whiplash.

Witnesses said the two female occupants of the Commodore ran across the park towards a junior soccer match where a group of onlookers rallied together and made a citizen’s arrest.

Elizabeth Heath had been at the match watching her grandson play.

“We were just all yelling ‘get the girls get the girls. They’re trying to get away’,” she said.

Another witness Irena Mladinich said the runaway teenagers could not escape.

“There was 15 of them, and they had them cornered so they had no room to run. They were escorted back to police,” she said.

All three teenagers were arrested and taken to hospital under police guard.

They were not badly hurt in the crash and will tonight be questioned by investigators.