Police have released a CCTV image as part of investigations into a serious arson attack on Vine Street, off Monks Road, in Lincoln.
The incident was reported at just after 2am on March 15. It is believed that the offender(s) entered the back garden and set the fire inside a shed adjoining the property at some point between 12am and 2am.
The back gardens are accessed via a passage from Monks Road which runs up to Lindum Terrace. It is between Vine Street and Lincoln College.
Lincolnshire Fire and Rescue were called to put the fire out, which was well alight by then.
Police have said no one was injured.
Officers released an image of a man who was in the area at the time of the incident. They said that whilst the picture quality is poor, they hope someone may recognise the distinctive jacket.
DC 1265 Carla Dawson said: “This appeared to be a serious attempt to cause danger to life. I would like to appeal for witnesses. Anybody who was in the area, or knows any information can contact me via 101.”