The Russian space agency announced on Saturday an unexplained loss of pressure on a cargo ship docked with the International Space Station (ISS), but said there was no threat to the crew, Reuters reported on Sunday, citing News.ro.

Roscosmos reported that flight control specialists discovered a depressurization in the cooling system of the Progress MS-21 cargo ship, which is scheduled to undock from the ISS on February 18.

The ship was cordoned off from the rest of the station, and the reason was found out.

“The temperature regime and pressure on board the ISS are normal, the lives and health of the crew are not in danger, they are feeling well,” Roscosmos reported.

This is the latest failure to occur at the ISS after a coolant leak in December on the Soyuz MS-22 spacecraft docked at the station.

• Read also: A brief history of Russian spacecraft accidents over the past 5 years

NASA said its experts are helping Russian colleagues troubleshoot the latest leak.

“Officials are monitoring all ISS systems and are not concerned with other issues,” the blog post said.

Soyuz spacecraft are used to transport crew to and from the station, while Progress spacecraft deliver equipment and supplies.

Earlier on Saturday, another Progress MS-22 spacecraft successfully docked with the ISS.

The problem with the Soyuz forced the station’s three current crew members, Russians Sergei Prokopyev and Dmitri Petelin and NASA astronaut Frank Rubio, to continue their mission. Now they will return to Earth on the replacement of the Soyuz spacecraft, which Russia is scheduled to launch on February 20.

Russia and the United States still cooperate closely on the ISS, despite the serious damage done to their relationship by Russia’s invasion of Ukraine. At the moment, there are seven crew members on board – three Americans, three Russians and one Japanese.

• Read also: The new head of Roscosmos officially demanded that Russia stay on board the ISS: We are not stupid

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