Hyderabad: A criminal case has been registered against a YSR Congress lawmaker from Andhra Pradesh for allegedly slapping an Air India station manager at Tirupati Airport. Lok Sabha lawmaker P Mithun Reddy went to his cabin at the airport and picked a fight with him regarding boarding passes for his relatives for a flight. He also shouted at the manager before allegedly slapping him. A case has been registered against him under different sections of IPC for preventing a public servant from discharging his duty, Yerpudu police station sub-inspector Ramakrishnaiah said.