Two homes were destroyed and an elderly woman killed by a fireworks explosion in Ayutthaya province early Tuesday.

Authorities suspect the victim was manufacturing fireworks illegally.

Earlier Wednesday morning, the explosion took place at a cluster of three wooden houses in Phra Nakhon Si Ayutthaya district. Two of the buildings were destroyed.

Rescue workers found the body of 66-year-old Urai Meemukjit and fireworks casings at the scene. 

Investigators concluded Urai made fireworks at her home without a permit. The forensic team believes  the victim was pressing gunpowder into the empty casings when it was ignited by a spark, triggering the explosion.

Pol Lt Col Sakdina Sukmak, deputy superintendent of Ayutthaya Muang Precinct, said it was likely the houses were being used as an illegal fireworks factory.

Firework shells left at the scene. (Photo by Sunthorn Pongpao)

The damaged house. (Photo by Sunthorn Pongpao)