NASA astronaut Chris Cassidy and Russian cosmonauts Anatoly Ivanishin and Ivan Vagner were woken on Monday night to search for a small leak on the International Space Station.

“Late Monday night, the Expedition 63 crew was awakened by flight controllers to continue troubleshooting a small leak on the International Space Station that appeared to grow in size,” said NASA in a statement released Tuesday.

NASA WORKING TO ISOLATE SPACE STATION AIR LEAK.

Station Commander Cassidy, Ivanishin and Vagner were told to collect data from various locations in the Russian segment of the space station.

International Space Station file photo, May 29, 2011.

and Russian segments of the space station were opened again and the crew resumed their normal duties.

“The size of the leak identified overnight has since been attributed to a temporary temperature change aboard the station with the overall rate of leak remaining unchanged,” NASA noted.

segment of the orbiting space station resulted in Cassidy briefly joining Ivanishin and Vagner in the Russian Zvezda service module.