Police have released CCTV images after four men were assaulted in Preston city centre.
One of the men suffered a broken jaw, broken leg and injuries to his mouth during the attack outside the Harris Museum at 1.20am on Sunday August 4.
A second man suffered bruising to his body and head. The two other men were not injured.
It was reported that the victims, in their 20s, were sat on a bench when they were approached by a group of Asian males and then assaulted.
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Det Sgt Michael Mason, said: “This was a nasty attack on a group of men who were enjoying a night out.
“We’re working to establish who was involved and would ask that anyone who has information gets in touch with us as soon as possible.
“We want to identify the men in the CCTV images – if you know who they are, please get in touch with us as soon as possible.”
Anyone with information should call 101 quoting log number 137 of 4th August.
Alternatively independent charity Crimestoppers can be contacted anonymously on 0800 555 111 or online at crimestoppers-uk.org.