Police are investigating how two marked cars smashed into each other while responding to the same emergency call.

The cars, which were both travelling on blue lights, collided in Batchworth Lane at the junction with Kewferry Road, at 1.22am yesterday morning.

Hertfordshire Constabulary confirmed that no one was injured in the collision, but both cars had to be recovered and they are now investigating the incident.

Sarah Spence, spokesman for Hertfordshire Constabulary said: "It is being investigated, however, at this stage there is not thought to be any evidence of dangerous driving."

Ms Spence also confirmed that the two police cars were not in pursuit of anyone when the crash happened.