A teenage man has suffered a facial injury after being attacked in the Wetherspoons in Louth at the weekend.
The victim is believed to have been hit with a glass or bottle at the pub on Kidgate on Saturday, January 13.
Lincolnshire Police arrested a man in his 20s who has now been released under investigation.
A police spokesperson said: “We need to hear from anyone who was in the pub and witnessed what happened.”
Anyone with information should call police on 101, quoting incident 391 of January 13.
Alternatively, contact the independent charity Crimestoppers anonymously on 0800 555 111.