U.S. Secretary of State Marco Rubio says the United States is engaged in discussions involving Oman and Iran to ensure the safe passage of warships through the Strait of Hormuz while broader talks on Iran's nuclear programme continue. Rubio said progress has been made, although no final agreement has been reached. His remarks come amid heightened tensions in the Gulf and follow statements from Iranian officials denying direct negotiations with the United States. The developments highlight ongoing diplomatic efforts to reduce regional tensions and safeguard international maritime security.