A man was critically injured after falling from a moving ambulance in Watford.
At the time of the indecent, the man was in the company of a police officer and this is now being investigated.
The 46-year-old man was taken to hospital after the fall in Exchange Road, Watford, on Monday (12 April) at about 10:30am
Hertfordshire Police confirmed it referred itself to the IOPC (The Independent Office for Police Conduct).
A spokesman for the IOPC said: “We can confirm we have begun an independent investigation into the actions of the police concerning an incident in Watford, Hertfordshire, in which a 46-year-old man was injured and is currently critically ill in hospital.”
The spokesperson said that the investigation will look at the circumstances of the incident and the actions of the police prior.
“So far we have taken initial accounts from the officers involved,” they said.
“We are also appealing for any witnesses to contact us at email@example.com or on 0300 303 5724.”
The IOPC said it had taken initial accounts from the police and would be liaising with the man’s family.