Police are appealing for information after a man was attacked during an aggravated burglary at his home in Preston over the weekend.
The incident took place around 11.20pm on Saturday 30th July at an address on Stocks Road in Ashton when four youths have attempted to steal two motorbikes which were chained up and covered outside his house.
The 55-year-old occupant spotted the youths hanging around outside and went out to scare them off.
They then produced a knife and he retreated into his house but has been overpowered and punched to the floor of his home and repeatedly kicked.
Officers found him lying on the floor covered in his own blood after the alarm was raised by an anonymous caller.
The man suffered serious bruising and lacerations to his face.
He was taken to Royal Preston Hospital for treatment and later released.
The offenders made off with his motorcycle jacket including his wallet, mobile phone and keys for his bikes.
All four offenders are described as males wearing dark clothing and one with a balaclava.
Det Sgt Mark Riley of Preston CID, said:
"This was a cowardly attack on an innocent man who was simply protecting his property.
"This matter started as a few youths looking to steal a motorbike then descended into a knife point assault in which a man was badly beaten.
"After he has been incapacitated the youths have then taken his jacket and made a further attempt to take a bike but failed because of another bike chained to it.
"I would appeal to anybody that has any information about this incident to get in touch."
Anyone with information is urged to contact Lancashire Police on 08451 25 35 45.
Alternatively call Crimestoppers, anonymously, on 0800 555 111.