Pictures posted on VKontakte, the Russian equivalent to Facebook, and Instagram appear to show the river Daldykan near the city of Norilsk flowing a bright red color. Original image has been replaced.

Norilsk Nickel, the world's biggest producer of nickel and palladium, initially denied that its nickel processing factory had leaked industrial waste into the Daldykan river near the Arctic Circle.

Experts say that in the examined areas downstream of the accident site, in the Daldykan and Ambarnaya Rivers, the oil contamination had affected the phytoplankton. Contrastingly, in Lake Pyasino ...

Our studies were along the Bezymyannyi and Daldykan Brooks, the Ambarnaya River, in sources of the Pyasina River, in the confluences of the Pyasina and Dudypta Rivers, the Pyasina and Tareya ...