He also vowed to fight black money and corruption through a renewed agitation which would start from Aug 9 in New Delhi and said he would continue to fight for bringing back Rs 400 lakh crore of black money stashed abroad.
"Acharya Balkrishna is not a terrorist or a criminal, rather he has honestly worked for the welfare of crores of people through his knowledge on Ayurveda. We are standing by him on moral grounds," Ramdev told reporters here at Lachhiwala area where he was stopped by the police.
Later, Ramdev sat on a dharna in front of the CBI office here to protest against the arrest of Balkrishna.
He criticized the centre for misusing their investigative agencies for harassing people, who dedicated their lives for the sake of people.
"The centre is using the CBI as its puppet," he said.
Regarding the allegations on his aide Acharya Balkrishna for obtaining passport on fake documents, Ramdev claimed that Nepalese government has already communicated to India that Balkrishna is not a Nepalese citizen.
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Ramdev said he was not scared of any investigation against him as well as his trust.
"I am not scared. Only those people should be scared who have stashed the country's money in foreign banks," he said.