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WASHINGTON: Astronauts working on the International Space Station (ISS) briefly sheltered in a docked capsule on Friday as Russian colleagues assessed leak repairs, Nasa said.

Five astronauts had briefly entered the docked Dragon spacecraft as a precautionary measure -- the capsule functions as a lifeboat of sorts in case an evacuation is needed. Nasa gave the all clear and the astronauts were able to return to their stations.

A Nasa spokesperson said Russian cosmonauts took measurements of the leaks and were now assessing data.

“With today’s operations, they wanted to be extra safe, extra precautionary, and have the crew move into the safe haven posture,” the spokesperson said.