In August 2018, Malaysian authorities reported the disappearance of an industrial device containing radioactive material. The device was lost while being transported from Negri Sembilan to Selangor by two technicians employed at a company that provides testing, calibration and inspection services to heavy industries. There are concerns that the unknown amount of radioactive iridium contained in the device could cause radiation exposure or be used as a weapon, otherwise known as a ‘dirty bomb’. The incident was a reminder that nuclear security demands attention in Southeast Asia.