Police arrested a man at the scene of an incident in the Glengormley area of Newtownabbey, Co Antrim, in which four people were injured.
Officers had been in pursuit of a silver BMW, after it failed to stop on the Ballyclare Road around 1.30am on Sunday.
The driver turned on to the Antrim Road, and ended up colliding with a silver Peugeot at the Hightown Road junction.
Four people were taken to hospital for treatment for a range of injuries – none of which were believed to be life threatening.
The PSNI said: “We are appealing for anyone who was travelling between the Ballyclare Road and the Antrim Road/Hightown Road areas during the early hours of Sunday and saw a silver BMW 3 series, to contact us on the non-emergency number 101.”