The Arunachal Pradesh Forest Department has decided to delocate all the 52 Lisu families, who have encroached a large chunk of land at Namdapha National Park (NNP) in Changlang district of the state. Expressing concern over the reported shifting of nearly 500 Chakma families to forests following recent spate of floods in their inhabited area, the department said that it would soon serve notice to vacate the land.