"Shehla Masood was shot dead around 11 AM when she was sitting in her car," Senior Superintendent of Police (SSP) Adarsh Katiyar said.
The motive and details of the killing are awaited, he said, adding a hunt has been launched to nab the assailant.
Shehla, who sat on a fast here recently in support of Anna Hazare's 'India Against Corruption' campaign had also been working on a number of other projects, including wildlife conservation. She was actively involved in raising issues related to the deaths of tigers in the various sanctuaries of Madhya Pradesh.
Known to be a hard worker, Shehla also ran a company called 'Miracles' which used to do various things, including event management.
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