The Israeli military says it mistakenly shot killed three hostages during its campaign in Gaza, who it had misidentified as a "threat".
It identified two of them as Yotam Haim and Samer Talalka, but did not give the third name.
Earlier, Jerusalem was targeted by rockets for the first time since 30 October - though they were intercepted by the Iron Dome defence system.
The Israeli offensive has continued in Gaza - with residents reporting fighting in northern, central and southern Gaza.
Meanwhile, Israel says it will allow aid into Gaza through Kerem Shalom crossing, a move praised by the White House.
Hamas broke through Israel's heavily guarded perimeter on 7 October, killing 1,200 people and taking 240 hostages - some of whom were released during a brief truce.
The health ministry in Gaza, which is run by Hamas, says more than 18,700 people have been killed and 50,000 injured in the enclave since the start of the Gaza war.
