China said on Tuesday it supports "all efforts" towards peace between Russia and Ukraine after presidents Vladimir Putin and Volodymyr Zelensky looked set for a summit in the coming weeks.

"China always believes that dialogue and negotiation are the only solution to the Ukraine crisis," foreign ministry spokeswoman Mao Ning said, adding: "We support all efforts that are conducive to peace."

A Hamas source told AFP on Monday that the Palestinian militants had agreed to a new proposal for a ceasefire in Gaza, devastated by more than 22 months of war between the Islamist group and Israel.

A senior Iranian official warned Monday that war with Israel could erupt at any moment, describing the current lull after June's 12-day conflict as only a temporary halt.

Israel on Monday announced it will provide emergency humanitarian aid to South Sudan, one of the world's poorest countries in the midst of renewed violent political instability.

Egypt said on Monday it was willing to join a potential international force deployed to war-torn Gaza, but only if backed by a UN Security Council resolution and accompanied by a "political horizon", as ceasefire efforts pressed on in Cairo.

Egypt has repeatedly called for Palestinian unity under the Palestinian Liberation Organization (PLO), an umbrella group that dominates the Palestinian Authority and excludes militant group Hamas.

U.S. envoy Tom Barrack on Monday called on Israel to honor commitments under a ceasefire that ended its war with Hezbollah, after the Lebanese government launched a process to disarm the militant group.

Under the November truce agreement, weapons in Lebanon were to be restricted to the state and Israel was to fully withdraw its troops from the country, although it has kept forces at five border points it deems strategic.

Rights group Amnesty International on Monday accused Israel of enacting a "deliberate policy" of starvation in Gaza, as the United Nations and aid groups warn of famine in the Palestinian territory.

U.S. President Donald Trump said reclaiming Crimea or entering NATO were off the table for Ukraine, as President Volodymyr Zelensky arrived in Washington for Monday talks aimed at ending the war with Russia.

Here are the outcomes of a summit meeting on Ukraine between U.S. President Donald Trump and Russian President Vladimir Putin, based on statements from Saturday:

Israel's military said Sunday it struck an "energy infrastructure site" in Yemen used by the Houthi rebels, the latest action against the Iran-backed group which has launched attacks at Israel throughout the Gaza war.