Assam BJP leader and social activist Sukumar Biswas died in Guwahati on Tuesday after prolonged illness, authorities at Gauhati Medical College and Hospital (GMCH) said. Biswas, ex-state secretary of the BJP, was reportedly suffering from cancer and died at the age of 50. "My condolences to the bereaved and prayers for his atman's sadgati," Assam CM Himanta Biswa Sarma tweeted.