Lancashire Police have launched a CCTV appeal after a Preston street assault.
Detectives are appealing for information after a man was found unconscious in Preston.
They want to speak to the man in the CCTV picture to see if he can help.
It was reported a man, 29 had been discovered with a head injury outside the Dog Inn, Church Street on Thursday 20 December.
Police were alerted by the ambulance service shortly after 4.30am.
He was taken by ambulance to the Royal Preston Hospital where he remains in a serious but stable condition.
Det Con Fabian Spence, of Preston CID, said: “It is possible that this man suffered these serious injuries as a result of an assault and I would appeal to anyone with information to contact us.
“We are especially keen to speak to the man in the picture to see if he can hep us and I would urge him to come forward and speak to us, or if anyone knows who is is I would ask them to get in touch”
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Anyone with information should contact police on 101 quoting log number 0142 of December 20th.