Oil prices slid as investors dial back fears of a supply shock after Donald Trump said Iran was "seriously talking" with Washington over the weekend.

Many people in Tehran and Tel Aviv are worried that Trump will make good on his threats to attack Iran again, but for some, it's fear laced with hope.

The US president says he has told Iran it has to do "two things" to avoid military action, as the US builds up its forces in the Gulf.

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

As President Trump warns that “we have a lot of very big, very powerful ships sailing to Iran right now,” our national security correspondent David E. Sanger breaks down what to know.

U.S. allies and partners in the Middle East again are urging restraint from both the United States and Iran as the Trump administration warns of a possible strike and builds up its military presence in the region.

Tehran has said it will never negotiate on its missile and defence systems, but that it is open to talks.

By Steve Holland and Bo Erickson WASHINGTON, Jan 29 (Reuters) - President Donald Trump said on Thursday he planned to speak with Iran, even as the U.S. dispatched another warship to the Middle East and Pentagon chief Pete Hegseth said the military would be ready to carry out whatever the president decided.

Iran's president accused President Donald Trump, Israeli Prime Minister Benjamin Netanyahu and European leaders of trying to "fragment society."