Detectives in Spalding are appealing for witnesses after a man reportedly suffered serious facial injuries and heavy bleeding in an attack in the town centre.
The assault happened in the early hours of Tuesday, January 16, with the victim reporting that the injuries had been caused by a number of people.
Lincolnshire Police are investigating the incident as GBH, and said that the victim took a taxi from Spalding to Peterborough.
The force is appealing for any taxi drivers who remember taking a man with facial injuries to come forward.
Anyone with information should call 101, quoting number 18000024345.