US media widely reported this week that the rocket was probably lost even as US spokesmen in the Pentagon declined to comment due to the "classified" nature of the mission.
"I would have to refer you to SpaceX, who conducted the launch," Pentagon spokeswoman Dana White said.
Another spokesman, Lieutenant General Kenneth McKenzie flatly refused to give any information, saying: "I'm done. We're not going to be able to give you any more information."
The secret Zuma spacecraft was scheduled to take off in November but was delayed for nearly two-months both the US government or SpaceX revealed anything about the "classified" spacecraft from the beginning, but as speculation has mounted over its disappearance in space the US government officials have become even more tight-lipped about the top secret mission.
SpaceX has launched national security payloads in the past, including a spy satellite for the National Reconnaissance Office, and an X-37B space plane for the US Air Force.