A 66 year old man has been seriously injured during an aggravated burglary in Accrington.
Police say the victim had answered his door to three men - one of whom was carrying pizza boxes.
They forced their way into his home, demanded money, and assaulted him with a claw hammer.
Nothing was taken.
Detectives are appealing for information following the attack, asking people to contact 101.
- Asian man, around 25-30 years old, of stocky build. He was wearing black clothing and had a scarf around his face.
- White man, around 5ft 10 inches tall wearing grey clothing and a scarf around his face.
- White man, wearing dark clothing and a balaclava.