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,

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.

A strange odor and droplets greeted cosmonauts aboard the ISS upon opening the newly arrived Progress MS-29 cargo spacecraft. Commander Sunita Williams led a swift response, sealing off the module and initiating air purification.