CAPE CANAVERAL, FL (WESH) - The first explosion happened shortly after 9 a.m. and the second about 20 minutes later.
NASA says SpaceX was conducting a test firing of its unmanned rocket when the blast occurred Thursday morning. The test, considered routine, was in advance of a planned Saturday launch from Cape Canaveral Air Force Station.
Buildings several miles away shook from the blast, and multiple explosions continued for several minutes. A cloud of dark smoke filled the overcast sky.
The Brevard County Emergency Management Office said in a tweet Thursday that "there is no threat to the general public from catastrophic abort during static test fire at SpaceX launch pad at CCAFS this morning."
Additional details were not immediately available. But sirens could be heard in the aftermath.
The rocket was supposed to hoist an Israeli satellite this weekend.