[Donger]

"Preliminary indication is that we had an oxygen/fuel leak in the cavity above the ship engine firewall that was large enough to build pressure in excess of the vent capacity. Apart from obviously double-checking for leaks, we will add fire suppression to that volume and probably increase vent area. Nothing so far suggests pushing next launch past next month," Musk said via X, the social media platform he owns, about 2.5 hours after Flight 7 launched. (Starship's Raptor engines are powered by liquid oxygen and liquid methane.)

That pressure overload apparently led to a fire "in the aft section of the ship, leading to a rapid unscheduled disassembly," SpaceX wrote in a blog post about Flight 7 yesterday evening, stressing that this interpretation is based on initial data analyses. ("Rapid unscheduled disassembly" is a term of art for a spacecraft explosion.)

"We will conduct a thorough investigation, in coordination with the FAA, and implement corrective actions to make improvements on future Starship flight tests," the company added, referring to the U.S. Federal Aviation Administration.

"Starship flew within its designated launch corridor — as all U.S. launches do to safeguard the public both on the ground, on water and in the air," SpaceX continued in the blog post. "Any surviving pieces of debris would have fallen into the designated hazard area."