"They (CBI) have started interrogating Kumar in their (CBI) Shillong branch office since 11 a.m. on the matter," an official told IANS on the condition of anonymity.
Kumar arrived at the office at Oakland here at 10.45 a.m.
Kumar arrived in Shillong on Friday evening from Kolkata via Guwahati after the Supreme Court, while hearing the matter on Tuesday, directed him to join the CBI probe at a neutral place.
A CBI team was allegedly roughed up and detained for a few hours when it went to question Kumar at his residence in Kolkata on Sunday in connection with its probe into the Saradha and Rose Valley chit fund cases.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)