Grove Park residents have been urged to be extra vigilant after a naked man was seen “aggressively masturbating” at a bus stop.

A woman was walking past the bus stop in Heather Road at 12.30am on April 16 when she noticed the man, who she described as being a white, in his late 50s and balding with light grey hair on the sides.

The woman, who cannot be named, said: "When he saw me, and I saw him, I started running and he started making the most awful grunting sounds and became quite aggressive with his willy.”

The woman added: "Even though he never chased me, who's to say he won't chase the next young woman and do something more aggressive."

A Met Police spokesman said: "We were called around 12.36am on April 16 to reports of a naked man outside Grove Park station playing with himself.

"When officers arrived the man had made off, the area was searched but officers were unable to locate the man."

Enquiries are continuing and anyone with information should call police on 101.