The special investigative team probing the disappearance of JNU student Najeeb Ahmad questioned four student leaders of the Akhil Bhartiya Vdyarthi Parishad (abvp) on Saturday.
Till late Saturday night, the four JNU students were yet to be released by the SIT.
A day after Lieutenant Governor Najeeb Jung met the SIT and ordered the team to increase efforts to trace Ahmad, the police summoned two students.
Sources said during their probe, officers realised that two other students knew more about Najeeb. The four students who were summoned are Arnab, Pushpesh, Sunil and Ankit.
“A notice has been sent to five other students. The SIT has got a tip off about Ahmad and are likely to crack this case within the next 48 hours,” an office said.
Till late Saturday night, the four were at the Vasant Kunj police station. Police on Friday increased reward to Rs 2 lakh on information about Najeeb.
A student of biotechnology, Ahmad had allegedly gone missing on October, following a brawl in the campus with some ABVP student leaders. Ahmad had allegedly slapped a leader of the ABVP before he went missing.
Jung has on Friday held a meeting with the special investigative team. The Delhi police had also increased the reward from Rs 1 lakh to Rs 2 lakh for giving information about Ahmad.
Four police officers met the L-G in the evening and told him about police probe so far, to find the student. Sources said the SIT has printed over 20,000 posters, which are being pasted all across south Delhi.
Police said they would print more posters. Apart from this, over 300 auto-rickshaw drivers who usually ply around JNU and parts of south Delhi have been questioned.