Both Fatah and the Popular Front for the Liberation of Palestine claimed responsibility for the attack.
The Popular Front for the Liberation of Palestine, which rejects Yasir Arafat's appeal to stop the bombings, claimed responsibility.
The Popular Front for the Liberation of Palestine claimed responsibility for the bombing in a call to the Qatar-based television station Al Jazeera.
The Popular Front for the Liberation of Palestine claims responsibility.
The Popular Front - which opposes the agreements Mr. Arafat has negotiated with Israel - again claimed responsibility, in a video sent to reporters.
The radical Popular Front for the Liberation of Palestine and the militant Islamic group Hamas both claimed responsibility for the attack.
In addition, the Popular Front was claiming extensive success in its campaign to destroy the power of the republic's Communist Party.
The Popular Front for the Liberation of Palestine claimed responsibility and freed the men, one Dutch and one Australian, after negotiations with the Palestinian Authority.
The Popular Front for the Liberation of Palestine claimed responsibility for shooting Rehavam Ze'evi, the 75-year-old minister of tourism.
The Popular Front had claimed responsibility for the 2001 assassination of an Israeli cabinet minister, and Israel says the five orchestrated the shooting.