A United Space Alliance employee fell to his death this morning while working on Launch Pad 39A at the Kennedy Space Center, NASA said.

Details about how the man fell, or what he was doing prior to the fall, remains unclear, said NASA spokeswoman Candrea Thomas.

NASA emergency medical personnel responded to the pad at about 7:40 a.m. and tried to revive the man, but were unsuccessful. An investigation into the accident is now being launched.

All work on the launch pad has been suspended while the man's death is investigated, Thomas said. She declined to release the man's name because his family has not yet been notified.

Workers are being offered counseling and other services, NASA said in a statement.