MOSCOW — A tour bus carrying Chinese tourists plunged through the ice on Russia’s Lake Baikal, killing eight people, officials said.

One of the Chinese tourists managed to escape from the bus, which was crossing the frozen lake on Friday, Irkutsk regional Gov. Igor Kobzev wrote in a Telegram post on Saturday. He said the dead included seven Chinese tourists and the driver.

The bus plunged into a 3-meter (10-foot) -wide ice crevasse, Russia’s Emergencies Ministry reported. The lake is 18 meters (59 feet) deep at the site of the accident, it said. The ministry said rescuers used underwater cameras before embarking on a diving operation.

The regional prosecutor’s office said a criminal probe had been opened. The Irkutsk tourism office reported on Saturday that the bus tour had been run by an unregistered operator.

Lake Baikal, the world’s deepest freshwater lake, is one of Russia’s key tourism attractions. Numbers of Chinese visitors to the country soared in recent years, after Moscow and Beijing introduced a mutual visa-free regime.

On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra recaps the weekend's county wrestling finals, and Jared Valluzzi has the plays of the week. Credit: Newsday

Sarra Sounds Off, Ep. 23: County wrestling finals On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra recaps the weekend's county wrestling finals, and Jared Valluzzi has the plays of the week.

On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra recaps the weekend's county wrestling finals, and Jared Valluzzi has the plays of the week. Credit: Newsday

Sarra Sounds Off, Ep. 23: County wrestling finals On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra recaps the weekend's county wrestling finals, and Jared Valluzzi has the plays of the week.

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