The truce appeared to end a three-day conflict in Gaza that barely changed the status quo in Israel and the occupied territories, but revealed splits among rival Palestinian militias.
The sudden spurt of violence since Friday is the worst in more than a year in the crowded, impoverished territory. The two-day death toll in Gaza rose to 20, according to Palestinian health officials.
In by far the biggest escalation of violence in Gaza since the end of a war in May 2021, Israeli airstrikes killed a militant leader and at least nine others, according to Palestinian officials.
The attacks came after Israel arrested another top militant from the same group and closed crossings into the Gaza Strip this week, anticipating retaliatory attacks.