 An airport in Hawaii has been briefly closed after two grenades were found in the hand luggage of a Japanese passenger. Police cleared the terminal at Hilo International Airport while a bomb squad moved in to investigate the items which had been picked up on x-ray. They were found to be inert. Akito Fukushima was arrested on charges of terroristic threatening. Officers have reminded the public that replicas of explosives such as hand grenades are prohibited in checked and carry-on baggage.