India, July 13 -- The Kolkata police on Sunday formed a nine-member special investigation team (SIT) while the West Bengal Commission for Women and its national counterpart registered suo-motu cases in the alleged rape of a 24-year-old woman on Friday by a second-year Indian Institute of Management Calcutta (IIM-C) student inside his hostel room on the campus, officials said.

The accused, Paramanand Mahaveer Toppannawar, 26, a resident of Karnataka, was arrested in the early hours of Saturday on the basis of a complaint lodged by the survivor at the Haridevpur police station in Kolkata.

"The SIT will probe all angles in the case. Phone calls made by the accused and the survivor and the chat history on their phone apps are being studied....