LARKANA/HYDER-ABAD: Police have booked six suspects on charges of impersonating registered students in the Medical and Dental College Admission Test (MDCAT) held at the Police Training School under the supervision of Dow University of Health Sciences, Karachi, on Sept 22. The FIR was lodged on a complaint filed by assistant registrar of Shaheed Mohtarma Benazir Bhutto Medical University (SMBBMU), Munwar Ali Pathan, under Sections 11/5, 419 and 420 of Pakistan Penal Code at Sachal police station on Sept 23 against the alleged impersonators Jamal-uddin, Ali Jan and an unidentified man, who managed to flee when police tried to catch him, and the actual candidates Mustafa, Altaf Hussain and Imtiaz Ali Tunio. A large number of students, who had taken MDCAT examination on Sunday, staged a demonstration outside local press club on Wednesday, urging the government to conduct it afresh as the paper had been leaked ahead of the exam.