HYDERABAD: The state government of Telangana has been ordered by the National Green Tribunal to file an affidavit in response to a petition which alleged that a threat has been faced by both Osman Sagar and Himayatsagar because of building unauthorized structures. The government has been given time until 26th of October by NGT to file a counter. The chairman of Human Rights and Consumer Protection Cell Trust, Thakur Rajkumar Singh, who filed the petition, alleged, “Go 111, which mandates a 10km buffer zone around the two lakes has been violated. There is a clear threat to Osmansagar and Himayatsagar due to the construction of illegal building”.