BBC: The Russian research ship Akademik Shokalskiy and Chinese icebreaker Xue Long have broken free from Antarctic ice where they had been stranded for several days.
The Russian ship's captain said a crack had appeared in the ice after a change in wind direction.
The Akademik Shokalskiy got stuck on 25 December. It has a Russian crew of 22.
On Thursday, the Xue Long's helicopter ferried 52 passengers from the stranded Russian ship to an Australian vessel.
The Xue Long then became stuck itself...