The space station's current crew includes Roscosmos' Aleksandr Gorbunov, Ivan Vagner and Alexey Ovchinin, and Nasa's Pettit, Nick Hague, as well as Sunita Williams and Butch Wilmore.

After opening the Progress spacecraft's hatch, the Roscosmos cosmonauts noticed an unexpected odour and observed small droplets.

Investigators are working to determine the source of the odour, which may have originated either from the Progress spacecraft or its vestibule connecting to the ISS. This incident follows a series of earlier issues with Russian spacecraft,