New Delhi, Jan. 15 -- The Delhi high court directed the Delhi Police on Tuesday to summon and seize the cellphones of members of two WhatsApp groups, on which the January 5 violence at the Jawaharlal Nehru University (JNU) was allegedly planned, and retrieve their contents.

The directions came on a plea filed by three JNU teachers - professors Ameet Parameswaran, Atul Sood, and Shukla Vinayak Sawant - through advocate Abhik Chimni seeking preservation of the WhatsApp chat and other relevant data.

Justice Brijesh Sethi directed WhatsApp and Google - WhatsApp chats of users is often backed up to their Google accounts -- to preserve and provide data to the Delhi Police to aid their probe into the violence that had broken out on the campus on...