A man was assaulted by three men in the early hours of Good Friday.
Police are appealing for witnesses to the attack in Rockingham Road, Kettering, which happened between 3.45am and 3.55am on Friday, April 3.
A police spokesman said: “As the victim was walking along Rockingham Road, he spoke briefly to three men.
“He was then assaulted and his glasses were knocked off; however, he was not injured.”
The offenders are described as white and one of the men is believed to have tattoos on his face and head.
Witnesses, or anyone with information, is asked to call Northamptonshire Police on 101 or they can call the independent charity Crimestoppers anonymously on 0800 555111 or use the anonymous online form at www.crimestoppers-uk.org.