SpaceX’s latest test flight of its massive Starship rocket ended in failure this week, marking the third consecutive setback for the spacecraft central to Elon Musk’s plans for future space exploration.

The rocket, which launched from SpaceX’s facility in Texas, lost control mid-flight due to a suspected fuel system leak. Communications were lost shortly after, and the vehicle ultimately broke apart and crashed into the Indian Ocean. No injuries were reported, according to the Federal Aviation Administration.

Despite the failed landing, SpaceX characterized the test as a partial success. Elon Musk noted that Starship reached its planned engine cutoff and praised improvements over previous flights. “No significant loss of heat shield tiles during ascent,” he posted on X, formerly known as Twitter.

Starship is critical to both Musk’s long-term goal of making human life multi-planetary and NASA’s Artemis program, which aims to return astronauts to the moon for the first time in over 50 years. The rocket is designed to be fully reusable and capable of carrying massive payloads—features that, if successful, could slash the cost of space missions and open the door to routine space travel.

This week’s incident follows two failed test flights earlier this year, in January and March. During this most recent attempt, the rocket was flying with a reused booster from a previous launch—a milestone SpaceX says is part of its mission to build cost-effective launch systems.

SpaceX referred to the incident as an “unexpected disassembly,” and said that teams are already analyzing the data in preparation for the next test.

Though setbacks are expected in early rocket development, the recent streak of failures adds pressure to SpaceX as both public and commercial partners, including NASA, look to the company to deliver on its ambitious timelines.