Afghanistan, June 14 -- U.S. President Donald Trump says Washington and Tehran are set to sign a long-awaited deal today.

U.S. President Donald Trump said on Saturday that a memorandum of understanding between Washington and Tehran will be signed on Sunday, expressing confidence that the agreement will prevent Iran from obtaining a nuclear weapon while warning that the United States has a "final option" if diplomacy fails.

Trump made the remarks in a post on his Truth Social platform, where he described the agreement as a barrier against Iran's pursuit of nuclear weapons and stressed that no money would be exchanged between the two sides under the deal.

The announcement comes after weeks of intensive negotiations between the United State...