Israeli military prosecutors have cleared Israeli forces of criminal wrongdoing during some of the bloodiest moments of the 2014 Gaza war, including an airstrike at a UN school which killed several children.

More than two years after the conflict, which killed 72 Israelis and more than 2,000 Palestinians, Israel’s military is still working through investigations into around 500 allegations against its troops.

So far criminal charges have been brought in three cases involving minor allegations like looting, while no charges have been brought for major incidents where civilians were killed.

Human rights groups have accused Israeli military prosecutors of shielding Israeli soldiers from war crimes prosecutions.

In the latest tranche of investigations, the prosecutors decided against any bringing charges in seven “exceptional incidents”.

The incidents included an airstrike at the gates of a UN-run school on August 3, 2014, which killed eight schoolboys as they bought sweets, according to Human Rights Watch.