Rajdhani Unnayan Kartripakkha on Tuesday demolished at least 50 unauthorised structures at Hatirjheel in the Hatirjheel-Begunbari Integrated Development Project area. The pulled down structures include tin and bamboo made shanties beside the Moghbazar level crossing and some concrete structures opposite the Bangladesh Film Development Corporation. The town planner started the drive in the project site on June 1 and it has so far bulldozed about 350 unauthorised structures