By Somjit Rungjamrasrassamee
The 2pm Wednesday explosion in Mae Sot district killed 42-year-old engine repairman Pirom Khongkaew at a camp for workers who are building the Second Thai-Myanmar Friendship Bridge.
The EOD squad said the explosion occurred in a room where construction materials including blasting fuses were stored.
Pirom had apparently been organising materials in the room and accidentally triggered the blast.
His body was found amid blasting fuses as the site was sealed off for inspection.
Operations have since resumed.