Story highlights The scare was a false alarm, NASA says

The U.S. astronauts are safe, NASA says

(CNN) The U.S. crew aboard the International Space Station relocated from its quarters after what turned out to be a false alarm on Wednesday, NASA said.

A possible ammonia leak in the cooling system had the crew from the American segment of the station move temporarily to the Russian segment.

It was a false alarm, NASA said.

Tests indicated that the off-scale measurements were the result of a computer failure, and not an ammonia leak.

International Space Station program manager Mike Suffredini said the relocation was done as a precaution because of four measurements that were off scale. These measures could have indicated an ammonia leak.

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