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Input: The force of the blast shook buildings several miles away. SpaceX said "an anomaly" had occurred while the rocket was being loaded with fuel. No-one was injured, it said. The rocket's payload, an Israeli-built communications satellite for Facebook due to launch on Saturday, was also destroyed, it added. Facebook, in partnership with Eutelsat Communications, had been due to use the Amos-6 satellite to deliver broadband internet coverage for swathes of sub-Saharan Africa as part of its Internet.org initiative. Facebook founder Mark Zuckerberg, who is currently visiting Africa, said he was "deeply disappointed" to hear that the satellite had been destroyed. "We remain committed to our mission of connecting everyone, and we will keep working until everyone has the opportunities this satellite would have provided," he wrote on his Facebook account. A leading Israeli space official said the loss of the Amos-6 satellite, valued at more than $200m (£150m) and owned by Spacecom, was a major blow to the industry. "As far as the Israeli communications satellite industry is concerned, this is a very severe blow which could place the future of the industry in doubt if it is not dragged out of the mud," said the chairman of the Israel Space Agency, Isaac Ben-Israel. Cape Canaveral Air Force Station said a "significant" explosion had happened just after 09:00 (14:00 GMT) at Launch Complex 40, which is leased by SpaceX. SpaceX said in a statement: "The anomaly originated around the upper stage oxygen tanks and occurred during propellant loading of the vehicle. A history of SpaceX in pictures "As per standard operating procedure, all personnel were clear of the pad and no-one was injured. We are continuing to review the data to identify the root cause." SpaceX is aiming to create a new era of reusable rockets and affordable private space travel and has used its Falcon-9 rocket to take supplies to the International Space Station (ISS). In December last year, the California-based company successfully landed a Falcon-9 back on Earth after a mission to launch orbiting satellites - a first in rocketry. SpaceX is run out of Hawthorne near Los Angeles by Elon Musk, who made his fortune with internet companies. As well as being the rocket company's CEO, he also heads up the Tesla electric car company. Analysis: David Shukman, Science Editor, BBC News Whatever the details of what went wrong at the launch-pad, this is bad news for one of the most ambitious-ever space programmes. SpaceX has big dreams for cheap, frequent and distant space travel. This test-firing was meant to be routine, part of an accelerating series of launches. Beyond it, SpaceX is looking to make history by re-using one of the massive first stages that was returned to Earth intact. The company is also preparing to fly astronauts to the International Space Station. Most exotic of all, the company's boss, Elon Musk, is due later this month to unveil his plans for a Mars colony, and how that would take effect. There had been talk of the first SpaceX unmanned mission to the Red Planet in a couple of years' time. All its timetables will now be in jeopardy.

SpaceX rocket explodes at Cape Canaveral ahead of launch