"According to preliminary information, on Thursday, December 15, damage occurred to the outer skin of the instrument-assembly module of the Soyuz MS-22 transport manned spacecraft," the agency said in a statement, adding that "a visual inspection confirmed the leak."
The crew reported that the warning device of the ship's diagnostic system went off, showing a pressure drop in the cooling system, the statement read.
"At the moment, all systems of the ISS [the International Space Station] and the spacecraft are operating normally, the crew is safe. After analyzing the situation, a decision will be made on further actions for both specialists on Earth and crew members of the ISS Russian segment," the agency added.
Earlier in the day, a depressurization of the cooling system of the Soyuz MS-22 spacecraft docked to the station was discovered, according to a live broadcast of radio chatter between cosmonauts and ground specialists.