
Pol Lt-Colonel Pramote Chuentarong, deputy inspector of Muang Ubon Ratchathani Police Station, said police got the fire alert at 2.10am.
About 15 fire engines took more than two hours to put out the blaze.
Pramote said the fire started at the house of Ubolsakaya Khanaiwong, 54, an electrician, before it quickly spread to the houses of Montha Kaewsai, 54, and Suwit Wichienperit, 55.
Ubolsakaya told police that he and his wife were at a fresh market when the fire broke out. He said his pet dog was killed in the fire.
Ubolsakaya said he suspected that there might have been a short circuit in his solar cell system that used three batteries to store electricity.
An eyewitness, Nanthakorn Ladpho, 18, told police that he heard an explosion and so he came out and found the fire starting at Ubolsakaya’s house, which also served as an electrical appliances repair shop. He said he saw the blaze engulf the house in just 20 minutes and spread to two other houses.