Key facts
- NASA issued an evacuation alert for astronauts on the International Space Station.
- The alert was triggered by a worsening air leak.
- Immediate crew return options are being considered.
NASA has issued an evacuation alert for astronauts aboard the International Space Station (ISS). The alert was prompted by a worsening air leak, leading the agency to consider options for an immediate crew return. This situation follows a previous alert that was later reversed after initial concerns over two small air leaks in the Russian segment of the station. Fractures in a Zvezda service module had been an ongoing concern, said Nasa, as it prepares to replace the ISS in coming years.