JERUSALEM (JTA) — At least 10 Palestinians are dead and dozens wounded in the shelling of a United Nations school in Rafah in southern Gaza.

The shelling took place on Sunday morning. Palestinian and United Nations officials blamed the Israel Defense Forces for the shelling.

The IDF said it was investigating reports on the attack. Rafah has been the scene of heaving fighting between the IDF and Palestinian gunmen since the attack on an IDF team decommissioning a tunnel, which lead to the death of two Israeli soldiers and the believed kidnapping of a third. That soldier, Hadar Goldin, later was declared dead.

Gaza’s Ministry of Health reported Sunday that at least 1,739 Palestinians in Gaza are dead and nearly 10,000 wounded since the beginning of Israel’s Gaza operation. In addition, more than 400,000 have been displaced from their homes. Some 64 Israeli soldiers have been killed during the operation, and three civilians, including one Thai worker.

Also on Sunday, representatives of Hamas, Islamic Jihad and the Palestinian Authority arrived in Cairo for talks on a possible cease-fire. Israel said it will not send a representative to the talks.