Assam Rifles, in coordination with Ngopa Police Station, recovered 758 grams of Heroin No. 4 near Teikhang in Saitual district during a joint operation on the intervening night of May 26-27, an official statement said. Acting on specific intelligence related to narcotics trafficking, a mobile vehicle check post (MVCP) was set up by Assam Rifles and Ngopa Police personnel.