A man was hit over the head with a bottle in Rushden town centre.
Police are appealing for witnesses following the incident which took place between 3am and 3.15am on Sunday, August 19.
A police spokesman said: “A 25-year-man, outside Connells estate agents in Rushden High Street, was struck over the head with a bottle, causing lacerations to his face and scalp.”
The offender was a 6ft white man in his early 20s, of slim build with dark hair and a goatee beard.
Witnesses to this incident, or anyone with information about it, can call Northamptonshire Police on 101 or information can be given anonymously to Crimestoppers on 0800 555111.