The attack began when two Black September operatives infiltrated a party being held at the embassy. Once these two were inside, two others climbed over the wall with automatic weapons and together the four took over the embassy. They allowed all the Thais to leave but kept six Israelis hostage, including Shimon Avimor, Israeli Ambassador to Cambodia who was visiting.[1] Rehavam Amir, the Israeli ambassador, and his wife Avital were attending the investiture ceremony of Vajiralongkorn as Crown Prince of Thailand at the Ananta Samakhom Throne Hall, thus they were not among the hostages and could therefore participate in the negotiations with the militants. Ambassador Amir and Prime Minister Thanom Kittikachorn was informed about the siege during a break in the middle of the ceremony.[2]
The militants moved their hostages to the second floor of the three storey building and made their demands.[citation needed] The militants demanded that 36 prisoners be released from Israeli prisons, including Kōzō Okamoto and the survivors of the Sabena Flight 571 incident.[citation needed] They threatened to blow up the embassy if these demands were not met by 08:00 on 29 December.[citation needed]
Two Thai government members, Dawee Chullasapya and Chatichai Choonhavan, who was then deputy foreign minister and became prime minister in 1988, along with the Egyptian ambassador to Thailand, Mustapha el Assawy, negotiated the release of the hostages and instead offered themselves and a number of other Thai officials as surety for the terrorists' safe conduct to Cairo.[3]
After 19 hours of negotiation, an agreement, subsequently dubbed the "Bangkok solution", was worked out and no-one was injured.[4]
Feeling that the Thai nation's celebration of the investiture of the heir to the throne should not be marred by a dispute that did not concern them, the Thai government guaranteed the terrorists safe travel to Cairo[5] while leaving the hostages in the care of the Thais.
The Black September leadership was reportedly upset with the behavior of its operatives in settling the incident.[1][6][7]
Then-Israeli prime minister Golda Meir praised the Thai government for their diplomacy which made for a bloodless end of the crisis.[3]
