ITANAGAR: Indiscriminate extraction of boulders and sand gravel from Debing river bed at Debing hill portion in East Siang district is forcing the river to change its course which may pose great threat to the people living at downstream in near future.

The Debing river (known as Rajakhana river in its downstream) is changing its course towards its right side which is affecting a large portion of fertile land under Ruksin circle and also posing serious threat to the Beat Out Post (BOP) of Arunachal Police Battalion, sources informed.