The Federal Aviation Administration temporarily halted air traffic at four Florida airports on Wednesday after a SpaceX craft broke apart after launch, raising concerns about falling debris.

The Starship vehicle broke apart following the eighth flight test of the rocket launched from Boca Chica, Texas.

The agency briefly halted flights into Miami, Fort Lauderdale, Palm Beach, and Orlando for possible space launch debris in the area, the agency said in an alert. According to flight tracking website FlightRadar24, several flights were observed holding their position off Florida’s coast and over the Caribbean.

The mishap marks the second time a Starship vehicle has broken up after ascending to space, disintegrating into a shower of sparks caught in multiple videos on social media.

The last such loss was on Jan. 16, after which the FAA required SpaceX to conduct a mishap investigation.

Last week, the agency lifted that prohibition, saying SpaceX could launch while the agency continues its oversight into the Jan. 16 mishap. The FAA on Thursday said it’s requiring a new mishap investigation of the latest flight.

Starship’s booster rocket successfully reentered the atmosphere and was “caught” by an assembly known as “Mechazilla,” but the vehicle itself was seen spinning in space before the break up.

In a post on X, SpaceX said during Starship’s ascent burn, the vehicle “experienced a rapid unscheduled disassembly” and lost contact with the ground. SpaceX immediately began “coordination with safety officials” on its contingency response plans, which also must be approved and coordinated with the FAA.

The ground stops at the airports lasted roughly 50 minutes, with Miami last to lift the order.