Police have released a CCTV image of a man they wish to speak to following an assault in Lancaster.
The incident happened outside the Lounge on Penny Street in the city.
The offender approached the victim and punched himon the left cheek twice causing swelling.
Damage was also caused to a Peugeot 406.
The victim, a 19-year-old local man was left shaken following the incident.
PC Claire Phillipson from Lancaster police said: “This appears to be an unprovoked attack on a man who was just enjoying a night out.
“If anyone recognises this man then I would ask them to contact us so we can track him down and speak to him.”
The incident happened in the early hours of Friday, August 23, at 4.25am
Anyone with information is asked to call Lancashire Police on 101 or Crimestoppers anonymously on 0800 555 111 or on-line at Crimestoppers-uk.org.
No personal details are taken and information is not traced or recorded.