Noted writer and Jnanpith award winner M T Vasudevan Nair, who had been undergoing treatment at a private hospital here following heart failure, has passed away, hospital sources said on Wednesday. He was 91. "MT has died," a hospital source told PTI without elaborating. The office of Kerala's Chief Minister Pinarayi Vijayan confirmed receiving the information about MT's demise. He had been under the care of a multidisciplinary team of specialists, including cardiologists and critical care experts, since his hospitalisation last week.