A SpaceX Merlin engine test failed this past weekend at the company’s facility in Texas, causing an explosion, reported Space.com.
There were no injuries.
According to the report, the explosion happened when the engine was filled with liquid oxygen fuel and tested for leaks. The fuel then ignited, but it is not clear whether the engine itself exploded.
Space.com reported that SpaceX was testing a Block 5 engine, which is set to be used in a future generation of the Falcon 9 rocket.
The active Falcon 9 rockets currently rely on Block 4 Merlin engines.
SpaceX said it is conducting an investigation into the cause of the explosion.