Latest reports from Turkish news are that Moskva sent out an SOS at 0105.
At 0114 she rolled on her side and at 0145 lost all electric power.
At 0200 a Turkish ship lay alongside and started evacuating sailors from the hill and the water, rescuing a total of 54 men.
At 0300 she is reported to have sunk. Rescue operations continue.
Total reported number of crew is 510.