A Soyuz capsule carrying Americans and Russians that was due to dock with the International Space Station has been hampered by a technical hitch.
The mission, involving astronauts from Nasa and Russia's space programme, had launched from Kazakhstan on Tuesday despite tensions between the two countries over Ukraine.
It was due to attach itself to the ISS after six hours but a problem with its approach forced the crew to suspend its attempt until Friday.
The capsule will now orbit the Earth 34 times before its next rendezvous with the space laboratory, when it tries to dock once again.
Russians Alexander Skvortsov and Oleg Artemyev and the US's Steve Swanson had taken off from Russia's Baikonur cosmodrome in a spectacular night-time launch that initially went off without a problem.
The issue arose once their Soyuz capsule was in orbit and a thruster failed to fire to assist its approach for docking.
US-Russia space cooperation has continued despite the diplomatic standoff over Ukraine and the joint work has been seen as one of the ways in which the two former foes can work successfully together.
Steven Swanson (L), Alexander Skvortsov and Oleg Artemyev US space agency Nasa said the Soyuz "was unable to complete its third thruster burn to fine-tune its approach" to the space station.
The trio had been using a fast-track approach to the ISS that Russia has been employing since 2013. After the problem, they are now using the traditional two-day longer approach that was employed up to 2012.
Nasa said the three men were "in good spirits" despite the change of plan.
The Soyuz capsule later carried out two manoeuvres in orbit bringing it on the correct trajectory for the rendezvous.
A third and final manoeuvre will be performed on Thursday to bring the craft to the right altitude for the eventual docking, the source added.
Head of Russia's space agency Roscosmos, Oleg Ostapenko, said the three were in no danger.
He said: "The crew have taken off their space suits and are continuing their flight normally."
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