It is also believed that a separate leak earlier this month was caused by an external impact on the cargo ship’s cooling system Pragati MS-21, which was removed by the authorities last week.
Both leaks have caused headaches for Roscosmos and NASA, resulting in them rearranging their schedules and postponing planned space walks.
“Space missions always carry a great risk of life-threatening emergencies for astronauts,” Roscosmos said.