The Zuma craft, thought to be a satellite, was built by Northrop Grumman after being funded by an unknown arm of the US government for a mysterious mission to be launched into a low orbit by SpaceX.
Northrop Grumman communications director Lon Rains said: “The Zuma payload is a restricted payload. It will be launched into Low Earth Orbit.”
SpaceX’s launch live streams have become a popular phenomenon online with thousands of people logging on to watch, but the feed suddenly cut before the fairing deployment.
The feed cut away from the fairing deployment, which sees the second stage of Falcon 9 and Zuma enter low orbit, to show the first stage rocket landing at Cape Canaveral.
The cut which is bound to send conspiracy theorists wild was announced before the launch due to the sensitive nature of the secret Zuma spacecraft.
Some viewers, however, must have missed the announcement and were confused when the pictures cut away before stage two began.
One Twitter user said: “I was enjoying watching until you cut the feed prior to stage 2.”
Another posted: “SpaceX your live broadcast cut out at T-2 and did not reconnect for me. Disappointed.”
The private space agency launched the craft codenamed Zuma, thought to be a satellite, to carry out unknown observations and communications for the US government.
What the orbiter’s mission is and who will be operating it is unknown as US authorities are so far refusing the release any more information.
The satellite was launched on SpaceX’s Falcon 9 rocket from the Kennedy Space Centre in Florida.
The launch was successfully carried out earlier today following a series of delays.
Mr Rains said: “The US Government assigned Northrop Grumman the responsibility of acquiring launch services for this mission. We have procured the Falcon 9 launch service from SpaceX.
“As a company, Northrop Grumman realises that this is monumental responsibility and have taken great care to ensure the most affordable and lowest risk scenario for Zuma.”