NASA says an engine snag has delayed the arrival of a Soyuz spacecraft carrying three astronauts to the International Space Station until Thursday.
The Russian spacecraft carrying Russians Alexander Skvortsov and Oleg Artemyev and American Steve Swanson successfully launched into orbit from Kazakhstan early Wednesday andwas expected to reach the space station in six hours.
But NASA says in a statement on its website that the arrival was delayed because an engine burn "did not occur as planned."
NASA says the crew is in good spirits and is in no danger, but will have to wait until Thursday to arrive at the space station.
Russian spacecraft used to routinely travel two days to reach the orbiting laboratory before last year.