A helicopter carrying 16 tourists and crew on a volcano sightseeing trip in Russia's far east crashed into a lake on Thursday, leaving eight people feared dead and two others in serious condition, local officials said.

The Mi-8 helicopter crash-landed into Kuril Lake in the mountainous Kamchatka peninsula amid poor visibility and sank, governor Vladimir Solodov said. Staff of the Kronotsky Nature Reserve saved half of the people onboard, he added.

"They approached the scene in a boat and saved eight people," Solodov said in a statement. Two of the survivors were now in intensive care with various injuries.

Russia's Kamchatka peninsula is a large territory with few inhabitants but is visited by tourists for its volcanoes and scenery
Russia's Kamchatka peninsula is a large territory with few inhabitants but is visited by tourists for its volcanoes and scenery AFP / VASILY SUVOROV

The other eight were feared dead, but their fate was not immediately confirmed.

"We don't have any information about the rest," the spokeswoman for the governor, Alla Golovan, told AFP.

The helicopter was now lying at a depth of more than 130 metres (420 feet) some 800 metres from the shore, the governor said.

Map showing Russia's Kamchatka peninsula where a helicopter with 16 people on board crashed on August 12.
Map showing Russia's Kamchatka peninsula where a helicopter with 16 people on board crashed on August 12. AFP / STAFF

More than 60 rescuers and divers were dispatched to the scene but they did not have the necessary equipment to begin work, authorities said.

"The divers of the emergencies ministry cannot work at such depth. So we turned to the defence ministry for help," governor Solodov said.

"Robots will be studying the bottom of Kuril Lake at the site of the crash."

Survivors of a helicopter crash in far east Russia are evacuated to a hospital in Petropavlovsk-Kamchatsky. The Mi-8 helicopter carrying 16 people came down in a nature reserve on the mountainous Kamchatka peninsula.
Survivors of a helicopter crash in far east Russia are evacuated to a hospital in Petropavlovsk-Kamchatsky. The Mi-8 helicopter carrying 16 people came down in a nature reserve on the mountainous Kamchatka peninsula. Kamchatka regional government

The Investigation Committee said it was looking into a potential violation of air safety rules.

The tourists were from Saint Petersburg, Russia's second city.

The helicopter was carrying them to Khodutka, a volcano near the city of Petropavlovsk-Kamchatsky. The aircraft belongs to a firm called Vityaz-Aero, co-owned by a local lawmaker, Igor Redkin.

Earlier this week, Redkin made headlines in Russia when he admitted to killing a man he mistook for a bear.

Kamchatka is a vast peninsula popular with adventure tourists for its abundant wildlife, live volcanoes and black sand beaches.

In July, an aircraft from a small local company crashed in the peninsula, killing 19 people.

Russia has historically had a poor reputation for air safety but has significantly improved its record since the 2000s.

The country's major airlines have shifted from ageing Soviet aircraft to modern planes.

But maintenance issues and lax compliance with safety rules have remained a problem.

In May 2019, an Aeroflot flight caught fire while making an emergency landing at Moscow's Sheremetyevo Airport, killing 41 people.