On 21 December 1975, six militants attacked the semi-annual meeting of OPEC leaders in Vienna, Austria; they took more than 60 hostages after killing an Austrian policeman, an Iraqi OPEC security officer, and a Libyan economist. Several other individuals were wounded. The self-named "Arm of the Arab Revolution" group was led by Carlos the Jackal. The siege resulted in complex diplomatic negotiations. It ended two days later, after flights to Algiers and Tripoli, with all hostages released and all militants escaping. The fact that this was one of the first times that Arab states were targeted by a terrorist attack prompted them to aid in developing antiterrorism efforts at the United Nations.
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