NASA Evacuate US ISS - Emergency Evacuation On The ISS - Breaking: Crew Evacuated On The ISS

International Space Station: The six members of Expedition 42 are currently safely on board the Russian segment of the International Space Station sealed off from the rest of the orbiting laboratory after an increase in pressure in a water cooling line was spotted. It was feared Ammonia had leaked into the water which is fed into the crew modules.
The Expedition 42 crew members are safe and in good shape inside the Russian segment of the International Space Station following an alarm in the U.S. segment at about 4 a.m. EST.

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Flight controllers in Mission Control at NASA’s Johnson Space Center in Houston saw an increase in pressure in the station’s water loop for thermal control system B then later saw a cabin pressure increase that could be indicative of an ammonia leak in the worst case scenario. Acting conservatively to protect for the worst case scenario, the crew was directed to isolate themselves in the Russian segment while the teams are evaluating the situation. Non-essential equipment in the U.S. segment of the station was also powered down per the procedures.

In an exchange at 7:02 a.m. with Expedition 42 Commander Barry Wilmore of NASA, spacecraft communicator James Kelly said flight controllers were analyzing their data but said it is not yet known if the alarm was actually triggered by a leak or whether the situation was caused by a faulty sensor or by a problem in a computer relay box that sends data and commands to various systems on the station.

NASA TV will provide a live update at 7:45 a.m. ET at http://www.nasa.gov/nasatv