Unexplained leak from Soyuz spacecraft forces Russia to abort ISS spacewalk mission – video

A planned spacewalk by two Russian cosmonauts aboard the International Space Station has been cancelled after mission controllers noticed leakage from a docked Soyuz spacecraft.

A 'visible stream of flakes' was first observed about 7.45pm EST (0045 UK Thursday) prompting Russian flight controllers to abort the mission, a Nasa livestream showed.

Footage showed a torrent of snowflake-like particles spraying from the rear section of the capsule

• Unexplained leak from Soyuz spacecraft forces Russia to abort ISS spacewalk mission