US warns Iran to reach a deal or face strikes as Tehran and Moscow announce joint naval exercises in the Sea of Oman.

Arrivals at Tehran's airport this week mainly indicated Iranian and Middle Eastern airlines were flying to the Persian country amid heightened tensions with Washington.

Iran is pursuing a nuclear agreement with the U.S. that delivers economic benefits for both sides, an Iranian diplomat was reported as saying on Sunday.

The massive US military buildup in the Middle East, including warships, fighter jets, and refueling aircraft, lays the foundation for a potentially sustained campaign against Iran -- should President

President Donald Trump previously indicated that the U.S. could use Royal Air Force bases in Fairford, England, and in the British territory of Diego Garcia in the Indian Ocean, to conduct the strikes if Iran does not agree to curb its nuclear program.