SpaceX hasn't said much since the fiery blast consumed its Falcon 9 rocket and its commercial satellite payload. The rocket was scheduled to launch Saturday.
The company said an anomaly originated around the upper stage oxygen tank and occurred while propellant was being loaded into the vehicle.
SpaceX is still assessing the condition of its launch pad.
NASA spokesman Michael Curie said it's too early to know whether the explosion will impact planned NASA-related SpaceX launches to the International Space Station.
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"Even if there's a delay, we have other providers to deliver cargo to the Space Station," Curie said. "And right now, the Space Station is supplied. There are no concerns in that regard."
There's also no indication that the blast affected NASA's upcoming asteroid sampling mission.
Initial checks show no damage to the Atlas 5 rocket or the agency's asteroid-bound OSIRIS-REx spacecraft, which stood a mile from the blast.