A Falcon 9 booster that was destroyed after landing March 2 suffered a fuel leak during its flight that triggered a fire.

At one briefing about the upcoming Falcon 9 launch of NASA’s SPHEREx astronomy spacecraft and PUNCH space science mission, Julianna Scheiman, director of NASA science missions at SpaceX, said a fire broke out about 48 seconds after what appeared to be a normal landing of the booster.

“That fire eventually resulted in the deterioration of the structural integrity of the landing leg in that booster and toppled over,” she said.

Scheiman said both SpaceX and NASA’s Launch Services Program (LSP) reviewed data from the incident. “There’s no concern or risk to ascent.