The third Starship test flight last March saw the spacecraft reach its planned trajectory and fly halfway around the world before succumbing to the scorching heat of atmospheric reentry. In June, the fourth test flight ended with controlled splashdowns of the rocket's Super Heavy booster in the Gulf of Mexico and of Starship in the Indian Ocean.

The "rapid unscheduled disassembly" was likely caused by a propellant leak, Elon Musk said, and was captured on video by spectators on the ground.

SpaceX says a fire might have caused its Starship to break during liftoff and send trails of flaming debris near the Caribbean. SpaceX's Elon Musk said preliminary indications are that leaking fuel built up pressure in the cavity above the engine firewall. The resulting fire would have doomed the spacecraft.

Witnesses spotted debris from a SpaceX Starship after the spacecraft exploded midair following a test flight from south Texas.

The U.S. Federal Aviation Administration said on Friday it will oversee an investigation by Elon Musk's SpaceX into an explosive Starship test flight the previous day that forced airlines to divert dozens of flights to avoid debris.

The explosion of a SpaceX rocket shortly after liftoff forced detours for dozens of planes as debris fell from the sky around the Turks and Caicos islands. Some of the planes had to declare fuel emergencies.

A fire in the aft section of SpaceX's Starship trigged the apparent explosion that destroyed the spacecraft, the company says.