Roman Nikolaichik, a Parliamentary Candidate for "The Other Russia", Gary Kasperov's anti-Putin coalition has been detained in a mental institution.
Roman was questioned and prosecutors originally tried to charge him with attempted murder.
A spokesman has claimed the charges are entirely fabricated and that he is being held solely for taking part in protests against Putin's rule.
Detention under false claims of mental illness was a common tactic used by Soviet Russia against dissidents