The island of Diego Garcia, which hosts a joint US and British military base, has been targeted by Iran with at least two mid-range ballistic missiles, according to The Wall Street Journal.
The report said that one of the missiles failed mid-flight while the other was hit by a US interceptor fired from a warship.
Diego Garcia is located south of the equator in the central Indian Ocean.
The Reuters news agency said the White House and British embassy in Washington did not immediately respond to a request for comment regarding the report.