Men, aged 26 & 23, and women, aged 23 & 20 are in custody following a collision on the Millburn Road in Coleraine last night.
Police received a number of calls regarding a Peugot 206 being driven erratically and allegedly being involved in theft in the Coleraine, Limavady and Derry areas from around 7pm last night.
The car was spotted by officers on the Cromore Road in Coleraine at around 8pm last night and was pursued by suitably trained officers. The car crashed on the Millburn Road a short time later.
Five people were taken to hospital and four of them were later arrested.