A pensioner is in hospital with serious injuries after being attacked by masked men armed with weapons including hammers and a baseball bat.
The 66-year-old, from Sheffield, was visiting a friend in the Sheffield Road area of Woodhouse when he answered a knock at the door to be confronted by three armed men at 7.45pm yesterday.
Police said the offenders forced their way into the house and one struck the victim with a baseball bat.
He fell to the floor and was kicked in the face before the culprits fled.
It is not yet known whether anything was stolen.
A South Yorkshire Police spokeswoman said: “The 66-year-old man answered the door to what he thought were previous visitors to the property, when he was confronted by three men wearing face coverings and armed with hammers.
“They forced their way into the property and one of the men hit the pensioner around the head with a baseball bat. He fell to the floor and was then kicked in the face before the suspects fled the scene.”
Detective Constable Steve Robinson said: “This is a particularly nasty assault on an elderly man.
“It is unclear as to whether anything was stolen from the property, and the motive for the attack is unknown.”
Witnesses, or anyone with information, should call South Yorkshire Police 101 quoting incident number 1,112 of November 28, or Crimestoppers on 0800 555111.