Two members of a left-wing students' body at Delhi's prestigious Jamia Millia Islamia university were detained by the police on Wednesday over their plan to screen the controversial BBC documentary on Prime Minister Narendra Modi at the mass communication department this evening. Police in blue riot gear and vans with tear-gas cannons reached the gates of the college in south-east Delhi. In an order issued on Tuesday, authorities at Jamia had said they will not allow any unauthorised gatherings on campus after the Students Federation of India announced the screening on Facebook.