MOSCOW -- A riverboat filled with families cruising on the Volga River sank on Sunday, and about 100 people were missing hours later, feeding fears that the episode could be the country's worst such accident in recent history.
The riverboat, called the Bulgaria, had set out with 188 people on board for a cruise in the Kuybyshev Reservoir, a reach of the upper Volga that is dammed and forms a broad lake, according to state television.
The Bulgaria, built in 1955, sank at 13:58 Moscow time (0958 GMT) Sunday near the village of Syukeyevo in the Kansko-Ustinovsky district of Russian republic of Tatarstan.