Moscow - At least 11 children and their adult instructor died in a storm while boating on a lake in Russia's northwestern region of Karelia, officials said on Sunday.
Vladimir Markin, a spokesperson for the nation's main state investigative agency, said several boats with children overturned in a storm in Syamozero, 120km east of the border with Finland.
Markin said of 47 children and four adult instructors in the boats, 11 children and one adult drowned.
He said an instructor has been detained as part of an official probe, suspected of violating safety rules.
The children who went boating came from Moscow.
Repeated warnings had been issued days ahead of the storm, advising everyone against boating on the lake...one of the favourite holiday destinations in the area, regional Karelia lawmaker Alexei Gavrilov said on Rossiya 24 television.
"They didn't have the right to go out boating," he said.
Local experts said that the lake could be extremely dangerous to navigate in strong winds and even experienced local fishermen stayed away from the lake over the weekend.