Gaza's nine-day-old ceasefire came under strain Sunday after the Israeli army said it launched air strikes in response to attacks it claimed were carried out by Hamas militants against its forces.

The coffins crossed into Israeli soil from Gaza after being collected by the Red Cross, Israel Defense Forces says.

Egypt is scheduled to host an international peace summit in the Red Sea town of Sharm El-Sheikh on Monday, co-chaired by Egyptian President Abdel Fattah El-Sisi and U.S. President Donald Trump, the spokesman of Egyptian Presidency said in a statement on his official Facebook account late Saturday.

All 20 live Israeli hostages held by Hamas were freed Monday, marking the first phase of President Trump’s brokered Middle East peace plan.

The IDF names two of the deceased hostages as Bipin Joshi and Guy Illouz, but is yet to name the other two. Meanwhile, the World Health Organization says it's scaling up operations in Gaza.

Italian Prime Minister Giorgia Meloni has asked the Global Sumud Flotilla -- which is trying to ferry humanitarian aid through an Israeli naval blockade to the Gaza Strip -- to deliver its aid to Cyprus, after the group's boats came under drone attack in the Mediterranean Sea.