4 Dead after Oil Platform Sinks in Russia, Rescue Halted

At least four people died and 49 were missing in freezing water after an oil rig in Russia's Far Eastern Okhotsk Sea overturned Sunday in the country's second major water accident since July.

The Kolskoye oil rig platform with 67 on board was 200 kilometers (120 miles) from the shore when the accident occurred at 0145 GMT amid high winds and temperatures of minus 17 degrees Celsius (1.4 Fahrenheit).

The platform was fully submerged by evening, and all four life rafts had been found with no people on them. Rescue efforts were complicated by high winds and waves up to five meters (15 feet) high.

The platform was being towed by a tugboat and icebreaker from the Kamchatka peninsula towards Sakhalin island.

"The portholes were damaged by ice and waves, and water began going into the vessel," regional ministry spokesman Taimuraz Kasayev said.

The crew was waiting to be evacuated by helicopter but the platform turned over and sank before they could board their rescue rafts, he said.

The Kolskoye platform had problems even before the accident, and was forced to constantly pump water out of one of its air tanks due to a leak, he said.

The tugboat was also forced to abandon rescue operations then "due to a crack that appeared in the engine room," said Russia's sea and river transport agency in a statement on its website.

By then the missing had spent more than six hours in the freezing water without life rafts.

Officials did not say whether there was any hope of finding any of the victims alive. They may be wearing wetsuits and life vests that were aboard the rig.

The potential death toll of 49 comes five months after 122 people drowned in the Volga river when the overcrowded pleasure boat Bulgaria sank in the Tatarstan region after turning over in stormy weather.

The Kolskoye rig belonged to a Murmansk-based joint-stock company, Arktikmorneftegazrazvedka (AMNGR), which is fully state-owned.

It engaged in shelf exploration in western Kamchatka peninsula for Gazflot company, a subsidiary of Russia's gas monopoly Gazprom.

The risk of an oil spill from the platform is "minimal", Kesayev said. "The fuel is in air-sealed tanks, so there is no risk of a spill."

"The investigation's main suspected reason for the accident was a violation of safety regulations by transporting the platform without taking account of weather conditions, as there was a strong storm in the area," investigators said in a statement.