A SpaceX rocket exploded at its launch pad in Cape Canaveral this morning, destroying a satellite that was meant to be used for Facebook’s new program to deliver internet services to the developing world.  

The satellite, called AMOS-6, was the result of a partnership between Facebook and French satellite firm Eutelsat Communications; AMOS-6 was set to ride into orbit on a SpaceX Falcon 9 rocket this Saturday. The Falcon 9 was destroyed today after a launch pad anomaly triggered the explosion.

AMOS-6 would have been the first satellite of Facebook’s Internet.org initiative to bring internet access to Africa, the Middle East, and Europe. Facebook founder Mark Zuckerberg addressed the setback in a post on the social media site earlier today:

Today’s explosion occurred at Space Launch Complex 40, a launch pad that is used by SpaceX to launch satellites and rockets carrying supplies to the International Space Station. SpaceX CEO Elon Musk hopes the company will be able to take passengers to Mars as early as 2025.

Shares of one of Musk’s other companies, Tesla Motors (TSLA Quick QuoteTSLA - Free Report) , fell more than 4.8% Thursday following the news.

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