The explosion occurred about 7.30am at Sak Oxygen shop on Maruphong Road in downtown Chachoengsao. Two people standing in front of the shop at the time of the blast died at the scene, while five others were injured, two of them seriously. Shop owner Sak Thavornwong could not be located after the incident. Police believe he likely died with his body disintegrated by the sheer force of the explosion and could not be recovered. Mr. Sak's son Pongsit Thavornwong, said he was sleeping upstairs when the tanks exploded. He said the tanks were not filled on-site, but rather collected from a factory.