On 29 October 1977, four armed Vietnamese hijackers seeking asylum in Singapore seized a Douglas DC-3, registration VN-C509, en route from Ho Chi Minh City to Phu Quoc Island with 32 passengers on board. The hijackers killed two of the six crew members and wounded a third before the aircraft was forced to land in Singapore. The pilot diverted to U-Tapao Air Base in Thailand for refueling. The flight continued to Singapore were it landed at 21:00 (GMT+07:30) at Seletar Air Base. The hijackers surrendered after negotiating with Singapore officials for five hours. Two days later, Vietnam sent an aircraft to Singapore to bring the DC-3, its crew, and the passengers back to the country.