A man serving term at the Morang District Prison in Biratnagar Metropolitan City-8 died on Tuesday.
The deceased has been identified as Man Bahadur Khapangi (54) of Athrai Rural Municipality-4, Tehrathum, Acting Jailer Tulsiram Bhagat said.
He was serving term for rape.
Khapangi was sentenced to 10 years in prison on January 23, 2018.
Police said that he was admitted to the Koshi Hospital in Morang on October 29 after he suddenly fell sick. Jailer Bhagat said that he breathed his last during the course of treatment at around 6 pm yesterday.