On Friday local time, the first-stage booster of SpaceX’s upgraded “Starship” rocket malfunctioned during a pre-dawn test in Texas, which may complicate the company’s efforts to demonstrate the rocket’s lunar landing capability to NASA.

SpaceX rolled the stainless-steel booster onto the test stand at the company’s Starbase rocket facility on Thursday, stating that it intended to test its redesigned propellant system and structural strength.

At approximately 4 a.m. Central Time on Friday, during testing on the test stand, an enlarged live video feed provided by SpaceX observation group LabPadre showed the booster suddenly invert and release a cloud of gas from the side, indicating that a pressure explosion may have blown open the booster’s exterior.

SpaceX did not immediately respond to a request for comment on the incident.

The booster that suffered the accident on Friday is the first rocket of “Starship V3”. SpaceX stated that this iterative version of the rocket includes a series of new designs and features related to the lunar landing program.

SpaceX is known for rapidly producing multiple iterative versions of boosters as part of its capital-intensive “test-and-fail” rocket development philosophy. However, it is unclear whether it has another V3 booster to resume testing, or how many months the incident will set back the Starship program.