Military planners are advising President Trump that any strike on Tehran's assets would almost certainly not be a singular, decisive blow.

The remarks differ from what Gen. Dan Caine, the chairman of the Joint Chiefs of Staff, is said to have told the president in high-level White House meetings.

Iran agreed a secret €500mn arms deal with Russia to acquire thousands of advanced shoulder-fired missiles in its most significant effort to rebuild air defences shattered during last year’s war with Israel.

The gambit was successful. At least twice, the president weighed ordering an attack on Iran, only to be dissuaded by aides from moving forward. But America now appears to be on the brink of war with Iran again. And this time, instead of acting as a deterrent, the Pentagon’s war plans are being used to draw up options for the president to consider.

Secretary of State Marco Rubio is traveling to the Caribbean country of St. Kitts and Nevis this week to reassert the Trump administration’s interests in the Western Hemisphere.

President Trump has threatened to strike the Islamic republic unless a deal is reached on curbing its nuclear programme

Tehran and Mashhad universities saw anti-government protests Sunday, with students chanting against Ali Khamenei as security forces reportedly used tear gas.

President Trump is pressuring Iran to either curtail its nuclear program or face military strikes, after Iran amassed a large stockpile of highly enriched uranium. Here's what to know.

Oil prices slid 1% on Monday as the U.S. and Iran head for a third round of nuclear talks, and President Donald Trump floated a new round of tariff hikes.

After ordering the largest American military buildup in the Middle East since the onset of the Iraq War, President Donald Trump now has a decision to make on Iran.