He was picked up from his residence earlier in the day to prevent any untoward incident during Rao's rally in Kosgi, Kodangal, and was shifted to an undisclosed location.
His detention came in view of Reddy's threat to disrupt the Telangana Rashtra Samithi (TRS) chief's rally. He had called for a shutdown to protest it.
Tension prevailed in Kodangal following Reddy's detention. The police have already imposed prohibitory orders in the town to prevent any untoward incident.
Elections to the 119-member Telangana Assembly are scheduled for December 7.
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