Ramdev, who was staging a sit-in in front of the CBI office here in protest against Balkrishna's arrest, left for Suddhowala jail soon after his aide was remanded to judicial custody by a court.
Earlier, a CBI court rejected the bail application of Balkrishna and remanded him in nine-day judicial custody in a fake document case.
Balkrishna was arrested yesterday after the court issued Non Bailable warrants against him after he failed to appear before it. CBI had on July 10 filed a charge sheet in a special court here against Balkrishna in the case.