The crystal clear waters of the Siang river, considered the lifeline of northern Arunachal Pradesh for centuries, has suddenly turned dark black triggering panic in the frontier state. The East Siang district authorities have pressed the alarm bell as the water of the river, containing large volumes of heavy slag, is no longer fit for consumption. "The water can't be used for any purpose because it contains a cement-like thick material. A lot of fish died one-and-half months ago," said East Siang district deputy commissioner Tamyo Tatak.

The crystal clear waters of the Siang river, considered the lifeline of northern Arunachal Pradesh for centuries, has suddenly turned dark black triggering panic in the frontier state. The East Siang district authorities have pressed the alarm bell as the water of the river, containing large volumes of heavy slag, is no longer fit for consumption. "The water can't be used for any purpose because it contains a cement-like thick material. A lot of fish died one-and-half months ago," said East Siang district deputy commissioner Tamyo Tatak.