National Investgation Agency (NIA) today said, the Federal Bureau of Investigation (FBI) of the US is set to interrogate arrested Islamic State and Jamaat-ul-Mujahideen Bangladesh terrorist Mohammed Musiruddin alias Musa.<br/><br/>An NIA official said in Kolkata, the FBI team has already arrived in the city and is scheduled to grill Musiruddin from tonight.<br/><br/>A city court today granted the NIA custody of Musa, who was in judicial custody for two days. The West Bengal CID had arrested him from Birbhum station in July this year.