The parachutists, who have not been identified, were in free fall at around 120mph when two F15 jets passed below them.
The near-miss was captured on a GoPro camera attached to the helmet of one of the skydivers. One of the pilots told investigators that he was not aware that the airspace was open to skydivers.
CNN reports the pilots also said that nothing had been mentioned by air traffic control during their flight.
