Palestinian President Mr Yasser Arafat said Palestinian suicide bombers in Israel were supported by international powers.
Asked if he would do everything possible to stop the suicide bombers, Mr Arafat said: "No doubt. This is my policy from the beginning. Although, there are some - I don't want to say their names - some international powers supporting this [the bombings]".
Mr Arafat refused to answer when asked if the foreign powers were Iraq or Iran - which the United States accuses of supporting terrorism. Both countries deny the US charges.
Mr Arafat said that after a leader of militant Islamic group Hamas praised the latest suicide bombing near Tel Aviv which killed 15 people, Palestinian security forces arrested 24 Hamas leaders and members. He said he did not know who was behind that attack.
Palestinians are waging a 19-month-old uprising against Israeli military occupation in much of the West Bank and Gaza Strip outside their main towns and refugee camps - which had gained autonomy under a peace process frozen since 2000.
At least 1,345 Palestinians and 473 Israelis have been killed in the violence, marked by Palestinian bombings and ambushes and Israeli army incursions into self-rule zones.