Three men have been arrested after a man was found lying on a Lincoln street with a serious head injury.
Police attended the incident at around 3.45pm on June 2 on Belmont Street.
The 41-year-old Lincoln man was found my a member of the public, who called for an ambulance.
He was taken to Lincoln County Hospital where he is currently being treated for a serious head injury.
Three Lincoln men aged 20, 22, and 25, were arrested on suspicion of grievous bodily harm.
Officers believe the man was injured at a property on Belmont Street between 2pm and 3.45pm yesterday, then walked up Belmont Street before being helped by a member of the public.
Anyone who may have seen or heard any disturbance in the area, saw the injured man, or have any information relating to the incident should call Lincolnshire Police on 101, quoting incident 326 of June 2.
Alternatively, contact Crimestoppers anonymously on 0800 555 111.