Two teenagers were this evening being held by police following a high-tech moped chase across Hampstead.

The boys, both 17, were arrested yesterday evening in Agincourt Road and Mackeson Road. It came at the conclusion of a pursuit involving DNA spray, dog units and a helicopter.

The drama began when cops spotted two people riding a scooter in Pond Street they believed was stolen. They tried and failed to stop the pair, who sped across the Fleet Road junction before mounting a pavement and heading towards Cressy Road in Hampstead.

But when the scooter was caught in a police sting and its tyres let down, they abandoned it and ran off. Officers managed to spray them with DNA tagging spray during the sting.

Police arrested two teenagers nearby a few minutes later on suspicion of aggravated taking and driving away, dangerous driving and driving with no insurance.

They believe the chase was linked to a scooter theft late on Sunday night when a delivery driver had his vehicle taken while dropping off food in Maitland Park Road.

Cmdr Julian Bennett said today: “Police are working hard to keep the public safe and make the streets hostile territory for criminals who steal scooters, mopeds, motorbikes and bicycles and then use them for other offences.

“Our policing activity to tackle scooter related crime is making a difference as evidenced here, particularly using a range of new technologies including slim-line motorcycles, DNA spray and automatic tyre deflation devices.”