"Rao along with 13 other local party leaders were taken into preventive custody when they held a protest. They were later released," Panjagutta Police Station Inspector S Mohan Kumar told PTI.
Rao had staged a sit-in along with other party leaders near Rajiv Gandhi statue in Somajiguda here. As police shifted him in a vehicle, Rao and others were seen raising slogans 'Save Democracy' and condemning the "high-handedness" of police.
A video in which Rao is seen shouting at the police official started making rounds on social media yesterday.
The Congress leader is seen shouting at P Sudhakar, an additional inspector of police attached to Kamatipura Station, who was on duty at the Assembly.
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The video shows the inspector trying to stop Rao by informing him that he had instructions from his seniors not to allow any former MLA, MLC or MPs to the media point.
Following a complaint by the police official alleging that Rao had abused him, Saifabad Police had yesterday booked a case against Rao.