A man was found injured outside Wood Street police station during the early hours of this morning (Wednesday).
The victim, who is aged in his 20s, was taken to Pinderfields Hospital suffering from head injuries.
He had been assaulted in a house on nearby Rishworth Street.
Windows and the front door of the house were smashed and blood stains were visible on the window ledges.
The victim is still in hospital.
Two men, aged in their 20s, have been arrested in connection with the incident and are being held in custody.
Anyone with information should call police on 101 on Crimestoppers anonymously on 0800 555111.