Police are appealing for information following an aggravated burglary at an address in Ilkley Monday evening, 29 November.
The incident occurred at around 8pm last night on Brook Street when a suspect entered a residential property.
A 71-year-old man was inside the property at the time and was assaulted by the suspect with what is believed to be a metal bracket.
The victim suffered serious head injuries as a result of the assault and remains in hospital at this time.
The suspect has been described as a white male, slim build, approximately 6ft, with mousey brown hair.
Detective Inspector Suzanne Hall of Bradford CID said: “We believe this to be an isolated incident and have deployed enhanced NPT patrols in the area to reassure residents and the local communities whilst our enquiries continue.
“Anyone who may have witnessed any suspicious activity in the area or has any further information which may assist with enquiries is asked to contact Bradford CID via 101, quoting crime reference 13210617209."