UNITED NATIONS - The UN Security Council will meet Sunday to discuss US strikes on Iran's nuclear sites as Russia, China and Pakistan proposed the 15-member body adopt a resolution calling for an immediate and unconditional ceasefire in the Middle East.

It was not immediately clear when it could be put to a vote. The three countries circulated the draft text, said diplomats, and asked members to share their comments by Monday evening. A resolution needs at least nine votes in favor and no vetoes by the United States, France, Britain, Russia or China to pass.

The world awaited Iran's response on Sunday after President Donald Trump said the US had "obliterated" Tehran's key nuclear sites, joining Israel in the biggest Western military action against the Islamic Republic since its 1979 revolution.

Iran requested the UN Security Council meeting, calling on the 15-member body "to address this blatant and unlawful act of aggression, to condemn it in the strongest possible terms."

Israel's UN Ambassador Danny Danon said in a statement on Sunday that the US and Israel "do not deserve any condemnation, but rather an expression of appreciation and gratitude for making the world a safer place."

UN Secretary-General Antonio Guterres on Saturday branded the US strikes on Iran as a "dangerous escalation in a region already on the edge – and a direct threat to international peace and security."

"At this perilous hour, it is critical to avoid a spiral of chaos. There is no military solution. The only path forward is diplomacy. The only hope is peace," Guterres said in a statement.

Reuters