She made the announcement in a purported video clip that surfaced on social media today.
"I am coming to Jantar Mantar (in Delhi) on June 18. This is Baba Saheb's (B R Ambedkar's) mission of and we should not let it stop. You all must arrive there in big numbers," she purportedly said in the 22-second-long clip.
She also cautioned Bhim Army workers against "some people" who wanted to weaken their "movement".
The pamphlet also sought security for Chandrashekhar and his family.
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Chandrashekhar, a lawyer by profession, was arrested on June 8 by Special Task Force of Uttar Pradesh Police from Himachal Pradesh's Dalhousie in connection with his alleged role in the violence in Saharanpur.
Chandrasekhar had shot to limelight after holding a demonstration at Jantar Mantar in New Delhi against violence on Dalits in Saharanpur.
About a dozen police vehicles were set ablaze and 12 policemen were injured in subsequent violence on May 9.
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