Koyambedu Police has registered a case against two ticket checkers of Rohini theatre in Tamil Nadu’s Chennai for allegedly denying the right to watch a movie to a tribal family, police said on Thursday. "A case has been registered under IPC section 341 r/w 3(1) (x 1v) SC/ST Act, 1989," the Chennai Mofussil Bus Terminus (CMBT) Police said.