JNU administration has issued show cause notices to 20 students, including Kanhaiya Kumar and Umar Khalid, seeking their explanation for the alleged illegal confinement of the Vice Chancellor.<br/><br/>A group of agitating students had confined the VC and other senior officials in the administrative building for over 20 hours last month. JNU students and teachers have been agitating against the university administration and Delhi Police for their alleged failure to locate missing student Najeeb Ahmad.