The prime minister, an official statement said, expressed his grief on the demise of Kena and extended condolences to his family and supporters.
Kena (52) died last night at a private hospital in Guwahati in Assam.
He was a resident of Gensi village in Lower Siang district of Arunachal Pradesh.
Kena, who represented Likabali constituency, was first elected to the Legislative Assembly in 2004. He was re-elected to the House from the same constituency in 2009 and 2014.
The minister is survived by his wife, four daughters and two sons.
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