At least 15 people were killed and more than 80 wounded in the twin suicide bombings of two buses in the southern Israeli town of Beersheva on Tuesday.
The attack came hours after Prime Minister Ariel Sharon unveiled an accelerated timetable for his plan to pull settlers and troops out of the Gaza Strip.
Israeli Prime Minister Ariel Sharon was facing a battle on Monday to keep his coalition from fracturing and maintain his majority in Parliament after winning qualified Cabinet approval for his Gaza pullout plan. In Cairo, meanwhile, preparations ahead of the withdrawal were going ahead.
A Palestinian attacker blew himself up outside a nightclub in Tel Aviv early on Friday in the fourth suicide attack since Sunday.