According to multiple reports including WSJ, Reuters, Bloomberg, and UK statements citing US officials: Iran fired two intermediate-range ballistic missiles toward Diego Garcia on March 20-21, 2026.
One failed mid-flight due to malfunction. The second was intercepted (or engaged) by a US Navy SM-3 from a warship. Neither hit the base or caused damage.
The launch demonstrated range but failed to reach the target ~2,500 miles away.