Since Dalit student Rohith Vemula hanged himself in January, the new normal at his university in Hyderabad has been a tension that refuses to dissipate. Today, violence erupted as students attacked the media, threw stones at the police and kept the top official at the university hostage by surrounding for six hours the office-cum-residence of Vice Chancellor Appa Rao. He returned to work today after proceeding on long leave amid the furious protests that followed Mr Vemula's suicide in his hostel room.