The trio Arnab De, Subhendu Naskar and Sourav Bera, all drivers of IT sector pool cars, would be subjected to a test identification parade, a senior officer of Bidhannagar Police said.
The three accused along with another, who is at large, allegedly gangraped a 24-year-old woman at Salt Lake's Sector-V in a moving vehicle late on Sunday night.
"We have not pressed for police custody but wanted TI parade which will be held in another couple of days," the IPS said.