Contrary to the strict vigilance and protective measures taken by the authorities of Orang National Park for the conservation of the one horned Rhino a fierce encounter took place inside the park between a group of armed poachers and forest staff on the night of April 21, while a female rhino was killed by the poachers. Sources said that though poachers managed to make good their escape failed to take away the horn weighing about 1 kilogram. The forest staff led by Jayanta Deka Range Officer on hearing a gun shot near Nichilawari area of the park at about 7.30 pm conducted a search operation which lasted for several hours. The forest officials recovered the dead rhino near Amulya camp of the park. Several rounds of live ammunition of 303 rifle and many other articles were recovered from the spot.