The incident comes just days after the U.S. military announced it had struck Iran's largest naval warship as part of former President Donald Trump's Operation Epic Fury.

Footage showing the moment a US submarine torpedo struck an Iranian warship triggering a huge explosion has been released by the US military.

Staff at an RAF base on Cyprus were warned for the third time since Sunday of an 'ongoing security threat' as they were told to remain indoors until further notice

This story has been updated with additional information from U.S. Central Command about the sinking of an IRGCN corvette. An American attack submarine sank an Iranian Navy ship off the coast of Sri Lanka,

Sri Lankan Foreign minister Vijitha Herath earlier told parliament 180 people were on board the Iranian vessel, which he identified as the IRIS Dena.