"For clarity: after review of all data to date, Falcon 9 did everything correctly on Sunday night", Gwynne Shotwell, president and chief operating officer for SpaceX, said in an emailed statement to Newsweek. If additional reviews uncover any problems, she said, "we will report it immediately".
The nature of the mission remains shrouded in mystery. In the static fire test, SpaceX engineers will ignite all 27 of the heavy-lift rocket's engines almost simultaneously for the first time, holding the rocket down on the launch pad while they do.
The classified intelligence satellite, built by Northrop Grumman Corp, failed to separate from the second stage of the Falcon 9 rocket and is assumed to have broken up or plunged into the sea, said the two officials, who spoke on condition of anonymity.
Because of Zuma's secrecy, SpaceX didn't live stream the entire mission as it typically does. Information published that is contrary to this statement is categorically false.
In three weeks, the company has another Falcon 9 launch planned from Cape Canaveral Air Force Station's Space Launch Complex 40 as the company aims to put a communication satellite for Luxembourg into space.
Posted late Monday night in its official Twitter feed, a SpaceX picture showed the Falcon 9 launch and its first-stage landing.
A classified payload called Zuma, built by Northrup Grumman for the U.S. government, was being delivered to orbit.
The Falcon 9 launch, which was tasked to send the Zuma payload into low-Earth orbit, was again recently delayed due to issues with the rocket's nose. Falcon Heavy has been rolled out to launchpad LC-39A for a static fire later this week, to be followed shortly thereafter by its maiden flight.
Also, the company continued with preparations for future launches, including rolling the Falcon Heavy rocket back out to a different launch pad in Florida for additional tests. Additionally, a SpaceX rocket carrying supply missions to the International Space Station for NASA exploded in 2015.
But on Tuesday, Northrop Grumman spokesperson Lon Rains declined to answer questions about the mission, including the failure or success of its launch, cost, exact government customer, and more.
SpaceX competes for military launches with United Launch Alliance, a joint venture of Boeing and Lockheed Martin Corp., which was the sole provider for the Pentagon until Musk launched a campaign in Congress and the courts challenging what he called an unfair monopoly. And it plans to carry its first astronauts into space in its Dragon space capsule later this year.