A helicopter carrying 16 tourists and crew on a sightseeing trip in Russia's far east crashed into a lake on Thursday, leaving eight people including a child feared dead and two others in serious condition, local officials said.
The Mi-8 helicopter crash-landed into the icy waters of Kuril Lake in the mountainous Kamchatka peninsula in poor visibility and sank.
Staff of the Kronotsky Nature Reserve dispatched boats to the crash site and saved eight people, two of whom are now in intensive care with various injuries. Survivors praised wildlife inspectors for coming to their rescue in a matter of minutes.
"This situation is close to a miracle," said governor Vladimir Solodov.
The other eight — including the only child on board and the crew commander — were missing and feared dead.
"We don't have any information about the rest," the governor's spokeswoman, Alla Golovan, told AFP.
The wreckage of the helicopter was now lying at a depth of more than 130 metres (420 feet) some 800 metres from the shore.
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," Solodov said.
"Robots will be studying the bottom of Kuril Lake at the site of the crash."
Recounting the crash and subsequent rescue operation, wildlife inspectors said that the visibility at the lake was no greater than 100 metres, adding they heard the helicopter but could not see it.
When the staff of the reserve heard a loud "boom", they said they dispatched two motorboats with four inspectors, who reached the scene in about three to four minutes.
"Eight people were on the surface, who we immediately lifted onboard," inspector Yevgeny Denges said in a statement. The inspectors looked for other survivors but could not find anyone, Denges added.
Citing the survivors, the nature reserve said that the chopper began to sink nose first and the passengers managed to swim up to the surface from a depth of eight to nine metres.
"The water temperature in the lake is no more than 5-6 degrees (Celsius, 41-43 degrees Fahrenheit), it is impossible to remain in it for a long time," the reserve said.
The tourists were from Russia's second city Saint Petersburg.
One of the survivors, Viktor Strelkin, said that at the time of the accident he was sleeping and woke up when a stream of water hit him in the face.
"My friend's son was sitting next to me. He was fastened with a security belt and I did not have time to yank him out because I woke up too late," Strelkin said in remarks released by regional authorities.
Strelkin, who practices free-diving, managed to unfasten himself, breathe in some air before the cabin filled with water, get out of the aircraft and swim up to the surface.
The aircraft belongs to a firm called Vityaz-Aero, co-owned by local lawmaker Igor Redkin.
Earlier this week, Redkin made headlines in Russia when he admitted to killing a man he mistook for a bear.
Officials said that the helicopter had been in operation since 1984 but was in good condition.
The Investigative Committee, which probes major crimes in Russia, said it was looking into a potential violation of air safety rules. Helicopter tours to the area have been suspended until Saturday.
The regional prosecutor's office said it launched a probe to study "the implementation of the legislation on the provision of tourist services".
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 when it flew into a cliff.
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 persist.