New Delhi : The Supreme Court has asked the Centre and the Assam government to respond to a plea seeking directions to declare the area around Pobitora Wildlife Sanctuary an eco-sensitive zone and remove all encroachments. A three-judge bench of Justices B R Gavai, Vikram Nath and Sanjay Karol has issued notices to the Ministry of Environment and Forests and the state government with regard to the wildlife sanctuary in Assam.