Security was beefed up at Union minister Nitin Gadkari's residence and office in Nagpur after an unidentified person made threat calls, police said
Three threat calls were received at Gadkari's public relations office in Khamla area on January 14 between 11.25 am to 12.30 pm, an official said.
"We are working to identify the caller," the senior police official added
(PTI inputs)
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