Police in Bradford are appealing for information following an arson attack on a property in Little Horton.
The incident took place on Kettlewell Road at about 1.40am on Sunday June 2 after a fire took hold in a dustbin outside a maisonette.
The fire then spread to the doorway and stairwell of the property.
Firefighters attended and rescued an 81-year-old man who was inside at the time. He was taken to hospital for treatment to smoke inhalation.
The fire was one of several in bins near the maisonettes recently and officers believe it was started deliberately.
Detective Inspector Damian Roebuck of Bradford CID, said: “This was clearly a very serious and dangerous incident which could potentially have had tragic consequences and we are appealing for information and witnesses.
“It is believed suspects, possibly young people, have been targeting bins on Kettlewell Road recently and we would like to speak with anyone who may have information about who may be starting these fires.
“Anyone who has seen suspicious behaviour, may have home CCTV of groups of youths behaving suspiciously in the immediate area, or who can assist the investigation in any way is asked to contact Bradford District CID on 101 referencing police crime number 13190278473.
“Information can also be given online at www.westyorkshire.police.uk/101livechat or anonymously to the independent Crimestoppers charity on 0800 555 111."

Barrister Jailed Over Revenge Attack Plot Linked to Kirklees Drugs Gang Feud
Advertising A-Boards to Be Banned on Uxbridge Road in 12-Month Trial
Record Number of Manchester Schools Achieve Green Flag Status
Bradford Man Jailed After Admitting 36 Child Sex Offences
Man Arrested Following Bradford Jewellers Ram Raid
Man in Critical Condition After Vauxhall Assault
Leeds Station Gateway Set to Begin Opening in October
Two Arrested After Reported Firearms Incident in Leeds
Six Greater Manchester Police Officers Dismissed Over Racial Discrimination Case
Historic Chiswick Riverside House to Receive New Blue Plaque
Bradford Drug Dealer Jailed Over ‘Jake Line’ County Lines Operation
Legal Show
Alim OnAir
Remix Saturdays
Bhangra Nights