At least four people have died and about 50 are missing after an oil drilling rig sank in freezing seas in the Russian far east.
The Kolskaya rig was being towed some 200 kilometres off Sakhalin island when it capsized in a fierce storm, the BBC reports.
Fourteen people have been rescued alive but it is feared the rig overturned before the rest of the 67 people on board could escape on to life rafts.
Rescue efforts have been hampered by poor weather conditions.
