Elon Musk’s SpaceX Starship exploded into an enormous fireball on Wednesday night during a test for an upcoming launch, in a catastrophic setback for the private space company.

All of SpaceX’s Texas operations — including the explosion during Wednesday’s engine test — take place at the company’s Starbase facility in Boca Chica, a beachside community near Brownsville. The site sits along the Gulf of America, about 20 miles from the U.S.-Mexico border.