Detectives investigating an assault in the Churchgate area of Retford are appealing to anyone one who saw what happened.
A 26-year-old man was reportedly confronted by a group of men and punched in the head at around 1.45am last Saturday (2 February 2019) and suffered a fractured skull.
Officers believe there were people in the area around the time it happened who could hold key information.
If you saw anything or know of anything that could help, please call 101 quoting incident 181 of 2 February 2019. You can contact Crimestoppers anonymously on 0800 555 111.