Police have confirmed that one person has sadly died in the fire at the flat and shop on De Wint Avenue in Lincoln this evening.
Police said work is ongoing to establish the identity of this person.
Nobody else was seriously injured during the incident.
The investigation continues to establish the exact circumstances involved.
As previously reported, flames engulfed the building after residents heard an explosion just before 4.30pm.
More than 50 firefighters worked to put out the blaze, with eight crews involved.
If you witnessed anything in relation to the fire and have not already spoken to officers, or if you have any information that could assist the enquiry, please call us on our non-emergency number 101 quoting incident 281 of 21/12/2015.