After downing drone, Iran says it will respond firmly to any US threat

Iran says won't allow its borders to be violated

Iran said on Saturday it would respond firmly to any US threat against it, the semi-official Tasnim news agency reported, amid escalating tension between Tehran and Washington over the shooting down of an unmanned US drone by the Islamic Republic.

On Thursday, an Iranian missile destroyed a US Global Hawk surveillance drone. Tehran said the drone was shot down over its territory and Washington said it had occurred in international airspace.

US President Donald Trump said on Friday he aborted a military strike to retaliate for Iran's downing of the US drone because it could have killed 150 people, and