A 19-year-old lad was punched and sustained serious facial injuries while waiting for a taxi on a night out in St Helens.
The man was on Water Street at around 3.45am on Sunday (November 1) waiting for a taxi when he was punched to the right side of the face.
The victim did not see his attacker but sustained serious facial injuries in the assault.
Investigations are ongoing in the local area and CCTV opportunities are being explored.
Officers are appealing for anyone who was in the area of Water Street and who may have witnessed the assault to contact Merseyside Police on 0151 777 6816 or the confidential Crimestoppers line, anonymously, on 0800 555 111.