The road is closed on King Street, Lancaster outside the Tesco Express and police say the road is expected to be closed for some time.
An eyewitness said it appeared three cars were involved in the crash.
Lancaster Area Police said: “Please can we ask you to find alternative routes and thank for your patience.”
More to follow.
1. King Street accident
Emergency services at the scene of an accident on King Street in Lancaster this morning. Photo: submit
2. King Street accident
Police and ambulance on King Street in Lancaster where there has been an accident this morning. Photo: submit
3. King Street accident
Police have taped off the scene of the accident on King Street in Lancaster. Photo: submit
4. King Street accident
A policeman at the scene of the accident on King Street in Lancaster. Photo: submit
1 / 3