A 19-year-old was knocked unconscious in an attack at Dudley Bus Station - with police releasing images of four people they want to trace.

The teenager had his MP3 player and £100 jumper stolen in the sickening attack at the station off Fisher Street.

Police said he was approached by a group of people who assaulted him until he was knocked out.

Officers have released CCTV images of two males and two females they want to speak to in relation to the incident in the hope that someone will come forward.

A spokesperson for Dudley Police said: "We want to speak to these four people after a man was assaulted and robbed at Dudley Bus Station.

"The 19-year-old was approached by a group of people who assaulted him until he fell to the ground unconscious.

"His bag containing an MP3 player and a £100 jumper was stolen.

"Anyone with information can contact us via Live Chat on our website and quote 20/286497/22."

They did not share details of the date or time of the assault.