At least 448,000 barrels of oil spilled from a leaking Arctic pipeline, the Itar-Tass news agency said Friday. The report more than quadrupled previous Russian estimates of the disaster.
Oily river banks and knee-deep sludge blackened the snow-covered landscape of Russia's Komi republic, and a television report quoted experts as saying the scale of the damage would get worse in April with the thaw.
The estimate of 448,000 barrels is the equivalent of nearly 19-million gallons.
A 30-mile stretch of 20-year-old Usinsk pipe sprung dozens of leaks in the last two months.