The United States' travel advisory comes just ahead of high-level talks scheduled on Friday with Iranian officials in Oman, where diplomats are expected to address Iran’s nuclear programme and wider regional issues.

Tehran has conditionally accepted an American proposal for dialogue aimed at preventing further military escalation between the two adversaries. The move represents a significant diplomatic opening after weeks of increasingly hostile exchanges.

Iranian gunboats unsuccessfully attempted to intercept a US oil tanker in the Strait of Hormuz on Tuesday before a US Navy vessel intervened, reports say.

US President Donald Trump vowed to use force if Tehran ignored his demands and announced an “armada” heading toward Iran. Iran has indicated it is willing to shut down or suspend its nuclear program to calm a spiraling crisis with the United States,

US President Donald Trump renewed threats to strike Iran if it does not agree to negotiate a new nuclear deal, as US forces conduct a multi-day air exercise in the Middle East, bolstering Washington’s military presence in the region.

President Donald Trump said Iran is negotiating “seriously" with the U.S. as he keeps military options on the table and American naval forces move into the region.

Tensions have continued to rise between the two nations after the Iranian regime’s brutal crackdown on nationwide protests left thousands dead.

By Tuvan Gumrukcu and Parisa Hafezi ISTANBUL/ DUBAI, Feb 5 (Reuters) - President Tayyip Erdogan said Turkey is working hard to prevent U.S.-Iran tensions from tipping the Middle East into a new conflict,

Senior officials from the United States and Iran are preparing for high-stakes, face-to-face negotiations in Oman, as fears grow that prolonged hostility could spiral into open conflict. The talks, scheduled to take place in Muscat,