The terms of the truce agreement pausing the fighting in the Gaza Strip say it can be extended beyond its initial four-day term as long as 10 hostages are released for each extra day.
Israel has accepted that the failure to return the families together does not constitute a ceasefire violation given that the individuals could not be located.
The freed Israeli hostages captured by Hamas have arrived at hospitals where they will be reunited with their families, according to the Israeli military.