An Iranian drone was shot down as it aggressively approached an American aircraft carrier in the Arabian Sea on Tuesday, a US military spokesman has said. An F-35C stealth fighter jet which took off from the USS Abraham Lincoln warship shot down the drone in self-defence to protect the aircraft carrier and its personnel, US Central Command spokesman Capt Tim Hawkins said. The ship was approximately 500 miles from the Iranian coast when the drone approached it with unclear intent. No US equipment was damaged and no service members were harmed. It comes as the US continues to build up a military presence in the region, with tensions high between Washington and Tehran. US President Donald Trump has threatened to take military action against Iran if it does not negotiate an agreement to restrict its nuclear programme. On the same day, White House Press Secretary Karoline Leavitt indicated that negotiations between the US and Iran are still scheduled for later this week, although hostilities continue to loom as Iran's Supreme Leader Ayatollah Ali Khamenei warned any military attacks could ignite a regional war.