Taking questions at the 'Jan Samvad Kendra', a programme to find solutions to the problems of people, Das asked Chief Secretary Rajbala Verma and Land and Revenue Secretary K K Soan to probe the matter across the state.
Das said complaints, particularly from cities, were received that land of poor tribals and farmers were being usurped through fake settlements.
In Ranchi alone, complains of thousands of acres settlement had been received, an official release said quoting him.