Abu Nidal's radical Palestinian faction has been blamed for killing or wounding nearly 1,000 people in 20 countries since 1973. Here are some of his deadliest and most notorious attacks:

Jan. 29, 1994 -- Abu Nidal followers shoot dead Jordanian diplomat Naeb Imran Maaytah outside his embassy in Beirut, Lebanon.

Jan. 16, 1991 -- Abu Nidal's guerrillas kill two of PLO leader Yasser Arafat's top aides in Tunis, the PLO's headquarters-in-exile: Salah Khalaf (known as Abu Iyad), Arafat's long-time deputy and friend, and Hayel Abdel-Hamid (code-named Abu Hol), the PLO's security chief.

July 11, 1988 -- Five gunmen attack the Greek cruise ship City of Poros, killing nine people and wounding 98.

Sept. 6, 1986 -- Two gunmen open fire on the Neve Shalom synagogue in Istanbul during Sabbath services, killing 22 Jewish worshippers and wounding six.

Sept. 5, 1986 -- A Pan Am jet carrying 358 people is hijacked at Karachi Airport. Twenty people are killed when security forces storm the Boeing 747.

April 2, 1986 -- A bomb explodes aboard a TWA Boeing 727 as the plane approaches Athens airport. Four passengers killed.

Dec. 27, 1985 -- Eighteen people are killed and 120 wounded in simultaneous attacks on El Al ticket desks at Rome and Vienna airports by seven Abu Nidal gunmen.

Nov. 23, 1985 -- An Egyptian airliner with 97 passengers is hijacked to Malta by four gunmen who kill six passengers. Sixty passengers die in shootout when Egyptian commandos storm the plane.

July 11, 1985 -- Two bombs kill eight people and wound 89 in Kuwait. The attack is seen as part of Abu Nidal's campaign to blackmail the Gulf Arab states into paying him not to attack them.

April 10, 1983 -- Issam Sartawi, a leading PLO moderate and Arafat's main link to Israeli left-wingers, is shot dead during a Socialist International conference in Lisbon.

Aug. 9, 1982 -- Two gunmen attack Goldenberg's, a restaurant in Paris' Jewish quarter, killing six people and wounding 22.

June 18, 1982 -- Kamel Hussein, head of the PLO's Rome office and a close associate of Arafat, is killed when his booby-trapped car explodes in the Italian capital.

June 2, 1982 -- Israel's ambassador in London, Shlomo Argov, is critically wounded by Abu Nidal gunmen. Israel uses the assassination attempt as the pretext to invade Lebanon to crush the PLO three days later.

June 1, 1981 -- Gunman kills Naim Khader, the PLO's representative to the European Community, in Brussels.

Jan. 5, 1978 -- Said Hammami, the PLO representative in London and key moderate who met with Israeli left-wingers, is shot dead in his London office.

Oct. 8, 1974 -- A TWA airliner flying from Israel to Greece is blown up by a bomb over the Aegean Sea, killing all 88 people aboard.

Dec. 17, 1973 -- Five terrorists set a Pan Am Jet on fire at Rome Airport with thermite bombs, killing 32 passengers.