Russia’s Roscosmos will stop working with NASA and other western space agencies on the International Space Station. On early Saturday morning, Roscosmos director Dmitry Rogozin slammed international sanctions against Russia and said normal cooperation between the space agency and its western counterparts would only be possible after they were lifted.

This content is not available due to your privacy preferences. said in a tweet spotted by Reuters. “That’s why I believe that the restoration of normal relations between the partners at the International Space Station and other projects is possible only with full and unconditional removal of illegal sanctions.”

Rogozin said Roscosmos would submit proposals on ending its work with NASA and other international space agencies to Russian authorities. It’s unclear how the decision would affect the space station. The ISS is not owned by any single country. The US, European Union, Russia, Canada and Japan operate the station through a cooperative agreement between the countries. Roscosmos, however, is critical to the ISS. The Russian Orbital Segment handles guidance control for the entire station.

The US and many other countries imposed harsh sanctions on Russia following its invasion of Ukraine on February 24th. Among other effects, those sanctions have seen average Russians lose access to many western-made services, including Apple Pay and Google Pay. They have also made it difficult for Russian businesses to cash out their earnings from online marketplaces platforms like Steam.

The ISS isn’t the first joint space program to see its future thrown into uncertainty due to rising tensions between the West and Russia. In March, Roscosmos said it would not ferry OneWeb’s internet satellites to space until the UK government sold its stake in the company. That same month, the European Space Agency announced it was suspending its joint ExoMars mission with Roscosmos.