This is stated in a message on the agency's website.
It is noted that in the coming days the hatches of all compartments will be closed at the station in order to track the level of air pressure in each compartment.
At the same time, the American astronaut Chris Cassidy will be in the Russian module "Star" from Friday to Sunday.
"The check does not pose a threat to the crew and should help identify which compartment has a higher than usual level of leakage," NASA said.
Earlier, Roskosmos said that there was no threat to the ISS crew and the station itself.