The U.N. Security Council met on Sunday to discuss U.S. 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.

"The bombing of Iranian nuclear facilities by the United States marks a perilous turn," U.N. Secretary-General Antonio Guterres told the Security Council on Sunday. "We must act – immediately and decisively – to halt the fighting and return to serious, sustained negotiations on the Iran nuclear programme."