A man was attacked with a hammer in Kettering.
The incident happened in Nelson Street at about 7.45pm on Wednesday, August 5.
The man was hit to the body and the head with the hammer by a group of three white men.
They were all wearing dark clothes and balaclavas.
They left the scene in a black Vauxhall Corsa and drove towards Regent Street.
Witnesses, or anyone who knows anything about this incident, can call Northamptonshire Police on 101.
Alternatively, they can call the independent charity Crimestoppers anonymously on 0800 555 111 or use the anonymous online form at www.crimestoppers-uk.org.