15 people have reportedly been injured in the early morning mishap in a residential building in Mohammadabad in Mau.
The two-storey building collapsed after the blast occurred, trapping several people under it.
The house adjacent to it also collapsed due to the blast.
Chief Minister Yogi Adityanath has taken congnisance of the accident and has expressed his condolence to the family of the deceased.
He directed that District Magistrate, Superintendent of Police and all other officers to immediately provide all possible relief and medical help to the injured.
(This is a breaking news story. More information awaited.)