Amnesty International on Thursday accused Israel and Hamas of having committed “serious and extensive” violations during Israel’s assault in the Gaza Strip and urged the international community to boost its support for a United Nations inquiry into the alleged war crimes.

In its 119-page report, the London-based human rights group also called on Israel and Hamas, the Islamist group that controls Gaza, to fully co-operate with the UN probe headed by Richard Goldstone, an ex-chief prosecutor at the international criminal tribunals for the former Yugoslavia and Rwanda.