TAMPA, Fla. (WFLA) – SpaceX called off its Falcon Heavy launch attempt Friday night, about one minute before the rocket was supposed to take flight.

SpaceX did not immediately say why the launch was postponed.

“Standing down from tonight’s Falcon Heavy launch of ViasatInc’s ViaSat-3 Americas mission; vehicle and payload remain healthy,” the company tweeted.

A backup launch will now occur on Saturday, April 30 at 8:26 p.m.