SpaceX’s launch of a Falcon 9 rocket on Tuesday afternoon looked to be a “go”, but a wayward helicopter breached the safety zone at the 11 second mark causing the launch to be immediately aborted.

The Falcon 9 was scheduled to liftoff at 2:56 p.m. EDT (1856 GMT) from Space Launch Complex 40 at Cape Canaveral Space Force Station in Florida when SpaceX called the hold in the countdown, followed a few minutes later by SpaceX production supervisor Andy Tran scrubbing the launch for the day.

“Hold called due to Range being no-go; teams are setting up for tomorrow’s backup opportunity,” SpaceX wrote in a statement on Twitter.

The launch has been reset for today, Wednesday (June 30) at 2:56 p.m. SpaceX will have about an hour window to launch its Falcon 9.