Geo-Informatics and Space Technology Development Agency (GISTDA) officials have joined police investigating metal pieces of unknown origin that fell from the sky following the sound of an explosion in the Thai-Lao border area of Ubon Ratchathani province early Wednesday morning.

Metal pieces of unknown origin fell from the sky onto a villager’s rubber plantation following the sound of an explosion reported by residents of Tambon Na Pho Klang in Ubon Ratchathani’s Khong Chiam district on Wednesday morning.