TEHRAN, Iran (AFP)—Iran’s chief negotiator said Tuesday that Washington must accept Tehran’s latest peace plan or face failure, after US President Donald Trump warned the truce in the Middle East war was on the brink of collapse.

The war, which erupted more than two months ago with US-Israeli strikes on Iran, has spread throughout the Middle East and roiled the global economy despite the ceasefire, impacting hundreds of millions worldwide.

Both sides have refused to make concessions and repeatedly threatened to resume fighting, but neither appears willing to return to all-out war.