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Raw: SpaceX Falcon 9 rocket explosion is intense

An image from a webcam from NASA'S Kennedy Space Center, shortly after a reported explosion at a SpaceX launch site Thursday morning.
An image from a webcam from NASA'S Kennedy Space Center, shortly after a reported explosion at a SpaceX launch site Thursday morning. TNS

A massive fireball and explosion erupted Thursday at SpaceX's main launch pad, destroying a rocket as well as a satellite that Facebook was counting on to spread internet service in Africa.

Here’s a look at the blast.

More:

There were no injuries. The pad had been cleared of workers before what was supposed to be a routine pre-launch rocket test.

SpaceX chief Elon Musk said the accident occurred during the fueling of the rocket and originated around the upper-stage oxygen tank.

"Cause still unknown," Musk said via Twitter. "More soon."

The explosion — heard and felt for miles around — dealt a severe blow to SpaceX, still scrambling to catch up with satellite deliveries following a launch accident last year. It's also a setback for NASA, which has been relying on the private company to keep the International Space Station stocked with supplies and, ultimately, astronauts.

- The Associated Press contributed to this story

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