A US military surveillance drone has been shot down by Iranian forces while flying over the Strait of Hormuz. Iran's Islamic Revolution Guards Corps (IRGC) said the drone had violated Iranian airspace. But US military said it had been over international waters. It is also not known which model of the drone has been shot down, because there are divergent messages
IRGC commander-in-chief Maj-Gen Hossein Salami said the downing of the drone sent a "clear message to America" that Iran's borders were its "red line".
It comes at a time of escalating tension between the US and Iran.