Police said the Palestinian man attempted to assassinate Yehuda Glick, a controversial rabbi who advocates for greater Jewish access to the Temple Mount in Jerusalem's Old City, a holy site for both Muslims and Jews.
The new truce is to last through Monday. Talks in Cairo on ending the conflict in Gaza mark the first time Israel and Hamas have negotiated, albeit indirectly, on something other than prisoner exchanges.
An Israeli promise to refrain from shelling most of Gaza today to allow for humanitarian aid was met by reports of airstrikes, setting off recriminations.
Israel and Hamas blame the other for the collapse of what was supposed to be a three-day humanitarian cease-fire leading up to talks in Egypt.