A man was seen masturbating while hiding in some bushes in St Albans' biggest park.

Police are trying to trace a man who was committing a sex act on himself at Verulamium Park on Tuesday afternoon.

The man was seen by passers-by, including children, in the bushes by the Roman Wall by King Harry Lane between 3.30pm and 6pm.

He is described as a man aged in his late 30s to mid-40s with dark hair.

It is believed he was wearing a blue shirt and light brown chinos.

PC Dawn Rust from the St Albans Safer Neighbourhood Team said: “This happened just after the end of school yesterday and later into the afternoon.

"If you saw this man or know who he may be, please get in touch. No-one should have to be exposed to this kind of behaviour.”

Anyone with any information is asked to contact police on 101 quoting reference 41/0583/19.