Waterways near Russia's Siberian city of Norilsk have been rapidly polluted by a spill of more than 20,000 tonnes of diesel fuel in recent days, according to state media.
Russian President Vladimir Putin declared on Wednesday a state of emergency, dedicating federal resources to the clean-up effort. He said local officials had been inefficient in dealing with the disaster.
The spill occurred on Friday when a diesel tank ruptured at a thermal power plant, according to a statement by the city's main employer, metals miner Nornickel.
Al Jazeera's Paul Brennan has more.
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