The probe, which found Israel's military had misjudged Hamas' intentions, is likely to put further pressure on Prime Minister Benjamin Netanyahu.
An exchange of hostages for Palestinians jailed by Israel had been thrown into doubt after days of mutual recriminations. Israel has not yet commented.
The Palestinian group recently said they could delay the release of hostages, after accusing Israel of breaching some of the terms of the ceasefire agreement.
A fragile ceasefire between Israel and Hamas in the Gaza Strip took hold in January.
On Saturday, Hamas gunmen paraded three skeletally thin Israeli hostages for a propaganda video in which they were forced to thank their captors before their handover...
Hamas and President Trump have threatened to upend the cease-fire. Analysts say those words could prove hollow, but the deal still may not last beyond early...
Hamas and President Trump have threatened to upend the cease-fire. Analysts say those comments could prove hollow, but the deal still may not last beyond early...
A new threat to the Gaza cease-fire.
Israel says its forces have now withdrawn from a key Gaza corridor which means thousands of Gazans can now return home.
The Palestinians were released on Saturday afternoon in exchange for three Israeli civilian hostages whose gaunt appearances caused widespread condemnation.