Hemant Koli (38), a sub inspector posted at Udaipur, attended a two-month course for promotion to the rank of inspector.
The course completed on Tuesday and a final test was being conducted by the board today when the incident occurred, RPA Director Rajiv Dasot told PTI.
The officer participated in different activities like running, TT and yoga and collapsed during the breakfast break.
He was rushed to Kanwatia Hospital in Shastri nagar where he was declared dead.
"The cause of the death is cardiac arrest," Dasot said.
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