In a development described as unprecedented, by 1030 hours on Friday, Oct 29, 2021, the waters of Kameng River in Arunachal Pradesh in North East India suddenly became dark with large amount of silt and debris and thousands of dead fish floating on the surface. A video on twitter by 1300 hours[i] showed the dark Kameng waters. (The Feature image above is from twitter post by The Arunachal Pradesh on Oct 31, 2021)