The Federal Aviation Administration required Elon Musk’s SpaceX and Jeff Bezos’ Blue Origin to investigate what happened during their respective mega-rocket test flights this week.

The regulator said both companies must do what is called an “accident investigation.” These reviews involve the companies and the FAA working together to understand what went wrong, why it went wrong, and take corrective actions. In both cases, the regulator must sign off on the companies before the rockets can fly again. It was not immediately clear how long that would take.

In the case of SpaceX, there was an explosion during the seventh test-flight of its Starship rocket system, which was launched from Boca Chica, Texas on Thursday. Musk WRITES in X that the Starship itself becomes over-pressurized due to excess gas as it ascends into space, and it eventually explodes. Company official EXPLAIN on its website said that the interior of the ship was on fire.

The destruction of the Starship created a debris field that lit up the sky over the Turks and Caicos islands, prompting the FAA to slow and even transfer some flights in the near atmosphere as a result of low fuel levels. There were no reports of injuries, according to the FAA, but the regulator said it was working with SpaceX to “confirm reports of damage to public property in Turks and Caicos.”

SpaceX and the FAA seem to be at odds over one particular detail about the explosion. The FAA technically activates the so-called “Debris Response Area,” which the administration says it does only when pieces of the spacecraft fall outside the danger areas defined before launch. SpaceX insists on its website that “(a)ny remaining pieces of debris that fall into the designated area are dangerous.”

Hours before SpaceX’s rocket launch, Blue Origin’s New Glenn rocket lifted off from Cape Canaveral, Florida for the for the first time. The upper stage of the New Glenn rocket successfully made it into orbit, but the booster exploded on its way back down for an attempt to land a drone ship at sea.

The FAA said it was “aware that an anomaly occurred during the Blue Origin” mission, and that no injuries or damage to public property were reported.