Reddy, who is the prime accused in the cash-for-vote case, was released on bail from Cherlapalli Central Prison here yesterday.
He defied prohibitory orders by organising a rally along with TDP workers from the jail to NTR Trust Bhavan, which is TDP headquarters, DCP Rama Rajeswari said.
In his speech during the rally, Reddy allegedly said, "I will make all efforts to throw the family of KCR (Telangana Chief Minister) out of politics and work with the sole aim of bringing down KCR".
Reddy violated prohibitory orders promulgated by the Cyberabad Police and TDP workers obstructed free flow of traffic at Moula Ali without obtaining prior permission for conducting the rally, the official said.
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Cases were booked against Reddy, TDP MLAs M Gopinath, Vivekananda, Gandhi Arikapudi and TDP MP Mallareddy, besides several other TDP leaders under Section 188 (Disobedience to order duly promulgated by public servant), Section 506 (criminal intimidation), Section 509 (word, gesture or act intended to insult the modesty of a woman) as well as other relevant sections of the Indian Penal Code, he said.
The trio, who were in jail, were granted conditional bail by Hyderabad High Court on June 30.