The giant explosion that destroyed a SpaceX Starship vehicle on the test stand this week was likely caused by the failure of a pressurized nitrogen tank, the company said.

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.