Haimi, killed by Hamas on 7 October 2023, is the 13th out of 28 deceased hostages returned under a ceasefire.
The attacker is seen striking the 55-year-old woman with a large wooden stick during the assault in the West Bank village of Turmus Ayaa.
Hamas is diminished but far from spent - Israel may have to deal with it for some time to come
The deadliest day of attacks since the truce took effect on 10 October raises questions as to whether it will last.
Israel and Hamas accused one another of breaching the deal, which came into force on 10 October.
The derby between Maccabi and Hapoel is cancelled before kick-off after police say "smoke grenades and pyrotechnic devices were thrown".
The first of two bodies returned on Saturday has been identified as that of Ronen Engel.
The Israeli military says 20 living hostages have been released by Hamas and have returned to Israel.
One Palestinian family shares their story of life coming full circle - and what they believe lies ahead as talk turns to rebuilding Gaza
The Israeli military said it had fired at a "suspicious vehicle" it said had crossed the line demarcating the area occupied by its forces.