The explosion occurred just as Iran and the United States met Saturday in Oman for the third round of negotiations over Tehran's rapidly advancing nuclear programme
Ali Larijani, an adviser to Iran's Supreme Leader Ali Khamenei, made the remarks in response to recent anti-Tehran threats made by US President Donald Trump and Israel, Xinhua news agency reported quoting the official news agency IRNA.
Khamenei gave the order at an emergency meeting of Iran's Supreme National Security Council shortly after Iran announced that the Hamas leader was killed
