A Russian segment of the International Space Station was locked down this weekend after cosmonauts found an “unusual odor” emanating from a visiting cargo capsule, NASA said.

There was brief cause for concern at the ISS recently when crew there reported an unexpected odor coming from Russia's recently docked Progress spacecraft.

Russian cosmonauts aboard the ISS were forced to seal a hatch and don protective equipment after the arrival of a cargo vessel brought with it a bizarre smell.