Israeli warplanes struck targets across Gaza overnight and into Sunday, as well as two airports in Syria and a mosque in the occupied West Bank allegedly used by militants, as the two-week-old war with Hamas threatened to spiral into a broader conflict.

Israel has traded fire with Lebanon's Hezbollah on a near-daily basis since the war began, and tensions are soaring in the Israeli-occupied West Bank, where Israeli forces have battled militants in refugee camps and carried out two airstrikes in recent days.

Police in Cyprus said Saturday they arrested four Syrians on suspicion of setting off a small explosive device that caused no damage not far from Israeli Embassy in the capital Nicosia.

Police said the four, ranging in ages between 17 and 21, face charges of attempted destruction of property using explosives, possession and use of explosives and possession of a knife.

Egyptian President Abdel Fattah al-Sisi on Saturday suggested a "roadmap" to end the ongoing war between Israel and Hamas.

"I have invited you today to discuss... a roadmap... that would begin by guaranteeing the complete, secure, fast and sustainable flow of humanitarian aid to Gaza's residents, followed by immediate negotiations over pacification and a ceasefire," al-Sisi said at the opening of a summit in Cairo with the leaders of regional countries and senior Western officials.

U.S. Secretary of State Antony Blinken has said he welcomes the release of two U.S. hostages held by Hamas and shared in the families’ relief but noted there are many more captives, including children and elderly people.

Speaking to reporters, Blinken said he and President Joe Biden had been able to speak with the families of some of the hostages during their trips to the Middle East.

A group of Iranian-backed militias in Iraq said U.S. forces “must leave immediately” or their bases in Iraq and elsewhere in the region will continue to come under attack.

Militant groups have launched rocket and drone attacks in recent days against U.S. bases in Iraq and Syria, most of which were claimed by the Islamic Resistance in Iraq. The group has said the attacks are retaliation for Washington’s support of Israel and a warning not to intervene in the Israel-Hamas war.

Egypt is hosting dozens of regional leaders and senior Western officials for a summit on the war between Israel and Palestinian militant groups in Gaza.

The meeting on Saturday in Egypt’s New Administrative Capital, just east of Cairo, will discuss ways to de-escalate the fighting and seek a cease-fire amid mounting concerns about a regional conflict, Egypt's state-run media reported. Among those attending the summit are the leaders of Qatar, the United Arab Emirates and the Palestinian Authority.

The first of 20 trucks carrying humanitarian aid entered the war-torn and besieged Gaza Strip on Saturday through the Rafah border crossing with Egypt, said AFP correspondents on both sides.

U.N. humanitarian chief Martin Griffiths said he was "confident that this delivery will be the start of a sustainable effort to provide essential supplies... to the people of Gaza" and warned that "this first convoy must not be the last."

Soldiers are everywhere and the last residents are hurriedly packing in the northern town of Kiryat Shmona where Israel fears Lebanon's Hezbollah could open up a second front in its war with Hamas.

As smoke rises from the nearby wooded hills following the latest cross-border exchanges, soldiers in fatigues can be seen eating sandwiches on cafe terraces, buying bandages in pharmacies or emerging in groups from the bus station.

U.S. President Joe Biden said Friday he believed the first trucks carrying aid to Gaza would come through the Rafah crossing from Egypt within the next two days.

"I believe in the next 24 to 48 hours the first 20 trucks will come across the border," Biden said as he met European Union chiefs at the White House.

Hamas said Friday it was releasing two American citizens they were holding captive in Gaza since their Oct. 7 raid on Israel.

The Palestinian militant group said in a statement that in an agreement with the Qatari government it was freeing a mother and daughter for humanitarian reasons.