Mitra, a top Trinamool Congress leader and close associate of Chief Minister Mamata Banerjee, was presented before the court of Chief Judicial Magistrate (Alipore) amid heavy security during the day following his December 12 arrest by the Central Bureau of Investigation (CBI) on various charges including conspiracy and misappropriation of funds.

Following a ruckus created by Trinamool Congress activists during Mitra's December 13 court hearing, the CBI wrote to the city and the Bidhannagar police seeking adequate security measures to prevent the recurrence of any commotion.

After hearing the prosecution and the defence, the court extended Mitra's CBI custody till December 19.