US secretary of state heads to Riyadh as Washington announces 'substantial' new sanctions against Islamic Republic

As tensions rise between Tehran and Washington, Trump says his forces are 'locked and loaded'

Coalition to safeguard oil shipping in strategic route could stumble into 'accidental escalation' with Tehran, analysts warn

Islamic Republic has twice scaled back its commitment to the 2015 agreement with world powers in recent months

Former PM says Netanyahu too dependent on US president and made vulnerable by his erratic policies

Foreign Minister Mohammad Javad Zarif not scheduled to meet American officials, rushes into meeting with the French foreign minister

Tehran's foreign ministry accuses Foundation for Defense of Democracies and its chief Mark Dubowitz of 'launching a smear campaign' against it

No details provided on allegations against Fereydoun Ahmadi and Mohammad Azizi, detained amid severe financial crisis

Rouhani's plan would see country's central bank slash four zeros from local cash and rename it 'tomans'; legislation unlikely to be considered by parliament soon

Foreign ministry spokesman says action against ship which had been held by Gibraltar would be a mistake with grave consequences