The launch of a Soyuz rocket with a Progress refueling and resupply freighter was aborted seconds before liftoff Thursday in a rare scrub for Russia’s workhorse rocket, delaying the start of a journey to the International Space Station until at least Saturday and thwarting plans to test out a new automated fast-track rendezvous sequence.

A United Launch Alliance Atlas 5 rocket blasted off from Cape Canaveral at 11:05 p.m. EDT (0305 GMT) tonight to send Orbital ATK’s commercial Cygnus cargo freighter to the International Space Station. Follow the mission in our live journal.

SpaceX has delayed the next launch of a Falcon 9 rocket from pad 39A at the Kennedy Space Center until Sunday. The two-stage launcher will carry with another batch of 60 Starlink satellites into orbit.