A pedestrian was knocked down by an unmarked police car on a busy road outside a pub earlier this evening.
Road closures were quickly put in place and a cordon is expected to remain at the scene, close to the Sportsmans Arms overnight.
A witness told the ECHO that the police vehicle involved was an unmarked car, which was later confirmed by Cheshire Police.
The woman, who did not want to be identified, said: “An unmarked car hit a pedestrian.
“I was meeting mum and dad in the pub when it happened outside. I had to get escorted by a policewoman because the road was closed.”
Pictures taken at the scene show how officers cordoned off the road near the pub and a Co-op store.
Multiple police cars could be seen parked around the area with forensic investigators working inside the cordon.
The condition of the pedestrian is not yet known and Cheshire Police were unable to confirm any injuries caused by the crash.
In a statement, the force said: “Police are currently at the scene of a collision involving a car and a pedestrian in Warrington Road, Penketh.
“The incident took place at 7.20pm and the road remains closed at this time.”
A short time later, the force then confirmed that the vehicle involved was a police car and that they would be referring themselves to the Independent Office for Police Conduct (IOPC) over the collision.
They added: “We can confirm that the car involved in the collision is an unmarked police car.
“In line with normal procedure the incident will be referred to the IOPC.
“Emergency services remain at the scene. At this stage we are unable to provide further details – we will update you as soon as we can.”
Anyone with any information is urged to contact Cheshire Police on 101 quoting incident number 628165 or online at www.cheshire.police.uk.