The National Green Tribunal (NGT) has asked the Numaligarh Refinery Limited (NFL), a public sector company, to demolish within a month a 2.2-km-long wall blocking the elephant corridor near the Kaziranga National Park.

It imposed Rs. 25 lakh in fine on the NFL for destroying forests and levelling a hill for building the refinery.

An elephant calf died in May this year because of the wall built in 2011 on a hill close to the Deopahar reserve forest in Golaghat and the Kaziranga National Park.