New Delhi: A high-level body of Environment Ministry, headed by Jayanthi Natarajan, has expressed anguish over a BSF proposal seeking permission for building a patrol road in Mizoram along a tiger reserve bordering Bangladesh.In its recent meeting, members of the Standing Committee of National Board for Wildlife said that if a patrol road is built, it will be a threat to movement of wildlife in the Dampa Tiger Reserve, the biggest sanctuary in Mizoram.