'...Scroll.in examined screenshots of WhatsApp messages that were shared by social media users. Using Truecaller, an app that enables the identification of mobile phone users, and Facebook, the identity of some of the people exchanging messages about the violence was traced. The number associated with the message – “We entered their hostels and beat them up” – was traced to Saurabh Dubey over Truecaller. His Facebook profile shows he is an assistant professor at Shaheed Bhagat Singh Evening College of the University of Delhi. He manages a group called “JNUites for MODI”. Scroll.in called Dubey but his phone was not reachable. Earlier, at 5.39 pm, in another WhatsApp group called “Friends of RSS”, a person messaged to say: “Please join this group for unity against left terror. These people should be beaten up. That is the only treatment.” In response, someone said: “Get the people from DU to enter from the Khajan Singh swimming side. We are 25-30 of us here.” DU is likely to be a reference to Delhi University. Khazan Singh Swimming Academy is situated inside JNU, and has a separate entry gate. At the university’s main gate, however, visitors are checked before they enter the campus...'