Three people have died after their car collided head-on with a vehicle that was driving on the wrong side of the road.
Police believe the driver who was heading the wrong way could have been under the influence of drink or drugs during the crash in Peterborough in the early hours of Sunday.
Cambridgeshire Police said the man drove on the wrong side of a slip road to Stanground from Fletton Parkway shortly after midnight.
He then collided with the oncoming car “killing all three of its occupants”.
He was arrested on suspicion of driving while under the influence of drink or drugs, and of causing death by dangerous driving.
The suspect was taken to hospital in a critical condition.
A stretch of the westbound A road was closed and subsequently reopened.
Anyone with information should contact police on 101.