Police are investigating an assault outside of Club 135 on Tangier Street, Whitehaven at 12:30am on Saturday 27th April.
The incident is reported to have involved two men.
A Cumbria Police spokesman said: “A local man in his 40s received a head injury not believed to be life changing.
“The second man, described as being around 6ft tall, slim build and wearing a white t-shirt and dark jeans, is reported to have approached the other man, who was stood outside of 135 Bar and assaulted him before running off up George Street, Whitehaven.”
Anyone with information should call PC 2761 Davies on 101 or CrimeStoppers anonymously on 0800 555 111, quoting log number 8 of the 27th April 2019.