Police are investigating after a naked man jumped out of a bush in Morden Hall Park.

A witness has alleged she saw the man pleasuring himself while watching children play in the park, and she chased after him before he got away.

Merton police have said the naked man jumped out of a bush before leaving the park towards the Phipps Bridge exit at around 3pm on Sunday, September 18.

He is described as white, between 45 and 50-years-old and about 5ft 10ins.

Anyone who saw what happened, or has any information about the naked man, should contact Merton police on 101 quoting the reference 1411551/16.