Protests swept campuses across the country against the police crackdown at Jamia Millia Islamia after Sunday evening's violence over the new citizenship law. Students at the Aligarh Muslim University clashed with the police after their solidarity march was stopped. By midnight, Hyderabad's Maulana Azad Urdu University and the Banaras Hindu University raised their voices. In Delhi, hundreds gathered outside the Police Headquarters in response to a call from the students of Jawaharlal Nehru University. The trouble started Sunday evening after a protest march by the Jamia students ended in a pitched battle with the police, vandalism and torching of vehicles. The police, which used batons and teargas to contain the violence, later barged into the university and detained around 100 students. All the detained students were released around 3:30 am.