中国的救援破冰船或被困南极冰面

All 52 passengers aboard a Russian research ship stuck in ice for over a week in Antarctica were airlifted to safety Thursday, but now there are concerns that a Chinese vessel involved in the rescue has also gotten stuck.

On Friday, the crew of the Chinese icebreaker Snow Dragon, which provided the helicopter used in the airlift, said they were worried about their ship's ability to move through the thick sea ice after remaining stationary for several days.

The Australian Maritime Safety Authority says the Australian icebreaker Aurora Australis, tasked with taking the rescued passengers back to Australia, has been instructed to stay in the area temporarily in case the Snow Dragon needs help. The Authority said the crew of the Chinese ship will attempt to break through to open water early Saturday when tidal conditions are more favorable.