Bangkok chief Pol Lt Gen Sanit Mahathavorn (right), at the scene of the blast on Monday, told the media there was no bomb, but at the PVC pipe had a spontaneous explosion. Police earlier dismissed rumours the blast was a bomb plot because no traces of soot were found. Pol Gen Srivara said Wednesday no soot was detected but this may have been because of the rain and the small size of the explosive material used. Though the latest examination indicates the device was only as powerful as some firecrackers, as Pol Gen Srivara described it, investigators have vowed to hunt down the perpetrators. "Things will become clearer in the next three days," Pol Lt Gen Sanit said.

Source: Bangkok Post May 17, 2017 22:30 UTC