SpaceX's Starship mega-rocket exploded midair on Thursday, after which the FAA warned pilots of dangerous debris.

SpaceX suspects a fire may have caused its Starship to break apart 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.

"During the event, the FAA activated a Debris Response Area and briefly slowed aircraft outside the area where space vehicle debris was falling or stopped aircraft at their departure location."

Debris from Elon Musk's SpaceX Starship explosion has spread debris across parts of Turks and Caicos, according to some residents. That's more than a thousand miles from its launch in Texas. NBC News' Marissa Parra reports.

This is the spectacular moment the SpaceX Starship exploded and crashed over the Turks and Caicos Islands. Footage shows the falling debris leaving a fiery trail as it streaked across the picturesque blue-orange Caribbean sky,