MOSCOW—Russia aborted the launch of three astronauts to the International Space Station moments before they were scheduled to lift off Thursday, but the crew was safe, officials said.
The Russian Soyuz rocket was to carry NASA astronaut Tracy Dyson, Oleg Novitsky of Roscosmos, and Marina Vasilevskaya of Belarus from the Russian-leased Baikonur launch facility in Kazakhstan.
The launch was aborted by an automatic safety system about 20 seconds before the scheduled liftoff at 1321 GMT. Russia’s Roscosmos space corporation and NASA said the crew was safe, and Roscosmos chief Yuri Borisov said the next launch attempt is set for Saturday.
Mr. Borisov told reporters that experts quickly pinpointed the cause of the launch abort, saying it was triggered by a voltage drop in a power source
The space station, which has served as a symbol of post-Cold War international cooperation, is now one of the last remaining areas of collaboration between Russia and the West amid tensions over Moscow’s military action in Ukraine. NASA and its partners hope to continue operating the orbiting outpost until 2030.
For Ms. Dyson, it was to be her third trip to the orbital complex, where she was due to spend six months. Mr. Novitsky, who was to make his fourth flight to the orbiting outpost, and Ms. Vasilevskaya, on her first space mission as her country’s first astronaut, were set to return to Earth after spending 12 days in orbit.
The three astronauts were to join the station’s crew consisting of NASA astronauts Loral O’Hara, Matthew Dominick, Mike Barratt, and Jeanette Epps, as well as Roscosmos cosmonauts Oleg Kononenko, Nikolai Chub, and Alexander Grebenkin.
Russia has continued to rely on modified versions of Soviet-designed rockets for commercial satellites, as well as crews and cargo to the space station.
