The planned takeoff of a Russian Soyuz rocket carrying three individuals was cancelled 20 seconds prior to its planned departure on Thursday.

Roscosmos, the Russian space agency, had originally intended to launch a team of three astronauts from the Baikonur Cosmodrome in Kazakhstan to the International Space Station. According to officials, the crew is unharmed and the launch was stopped by an automated safety system.

No cause was immediately given.

While broadcasting the launch in real time, viewers were informed by the control room that the main support mechanism was moving away from the spacecraft, accompanied by the announcement of “Launch!” However, this was soon followed by an announcement of the “automatic cancellation of the launch.”

NASA had planned for the Soyuz rocket to transport Tracy Dyson, a NASA astronaut, and Oleg Novitsky from Roscosmos, along with Belarusian cosmonaut Marina Vasilevskaya, to the International Space Station. Upon launch, NASA announced that the crew would quickly be removed from the Soyuz capsule stationed on top of the rocket.

In October of 2018, a different Soyuz rocket bound for the ISS experienced a failure just two minutes prior to launch.

The cancelled flight is a setback for Russia, as the ISS is one of the few remaining areas of collaboration between Moscow and the Western world amidst its conflict in Ukraine.

The plan is for continued operations of the ISS until 2030, with NASA and its collaborating agencies.

Information for this report was obtained from The Associated Press and Reuters.