An inmate of Sirajganj prison died allegedly due to cardiac arrest at Rajshahi Medical College and Hospital (RMCH) early yesterday. The deceased, Shyamol Kumar, 35, was son of Ratan Kumar of Natun Chandpur village in Ullapra upazila. He was sentenced to four years imprisonment in a drug related case. According to jail sources, Shyamol was earlier taken to Sirajganj Sadar Hospital on October 13, when he fell sick due to cardiac problem. As his condition deteriorated, he was shifted to RMCH on October 14. He died there early yesterday, hospital sources said.