"Balkrishnaji has been jailed by the CBI. Is it a crime to talk about blackmoney? What Ramdev says is right...CBI is being used to threaten Ramdev and his disciples ," he said addressing Ramdev's supporters at Ramlila Maidan here.
Balkrishna was arrested on July 20 after after a non- bailable warrant was issued against him by a special court here for allegedly using fake and forged documents to obtain an Indian passport.
Gadkari said BJP gives its "full support" to Ramdev's agitation.
"We have not seen it once. We have seen it many times that CBI is misused by the government. They use it to blackmail people. They are trying to harrass people like Ramdev and his supporters," he said.