FOOTAGE has been released of a man police want to speak to after a serious assault at a bowling alley. 

A man attacked a security guard at the Tenpin Bowling and Peel Leisure in Blackburn on Saturday, in an unprovoked attack. 

The incident occurred at around 5.40pm when a man punched the security guard twice in the face, leaving him with a broken jaw.

The security guard, a 20-year-old man from Nelson, required treatment in hospital. 

Police have now released CCTV footage to try and track down a man they want to speak to. 

If you know the man in the video or have any information about the attack call the police on 01254353601, quoting incident reference 1158 of March 10.