Four men have been arrested in Grantham on suspicion of causing actual bodily harm and of theft.
Police were called to Welwyn Close yesterday (Wednesday) just after 8pm, following a report of an assault.
A 22-year-old man had received injuries of bruising and swelling.
Four men were arrested at the location. They are aged 28, 29, 34 and 49 and all are from Grantham.
Police are appealing to anyone with information to call 101 or Crimestoppers, anonymously, on 0800 555111.