Dr S S Shahi, who runs a private hospital in the constituency of Adityanath, received calls on his mobile phone on June 28 and June 29 in which the caller introduced himself as Ramashray Yadav, an inmate of Deoria district jail.
The doctor said in his complaint that Yadav demanded Rs 20 lakh from him and threatened him with dire consequences if he failed to pay.
Police security has been provided to the doctor, he said, adding, the matter was being probed and the caller would be nabbed soon.
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