A convicted war criminal died on Friday while serving his term at the Sylhet Central Jail. He was identified as Mujibur Rahman Angur Mia, 67. Read:War criminal Mahbubur Rahman dies at Kashimpur jail He breathed his last on Friday afternoon at Sylhet MAG Osmani Medical College Hospital. Earlier he suddenly fell sick in the morning  and was rushed to the hospital from the jail, reported our correspondent. He was sentenced to lifetime imprisonment after allegations of war crimes were proved against him. Confirming the death of Mujibur Rahman, senior jail superintendent of Sylhet Central Jail Muhammad Manjur Hossain said, "He died of old age health complicacies." Read: War criminal Abdus Subhan dies at DMCH Mujibur was arrested and sent to Dhaka Central Jail on February 12, 2012. The International Criminal Tribunal sentenced him to a lifetime in jail on June 1, 2016. He was serving his terms at Habiganj District Jail before being  transferred to Sylhet Central Jail in May this year. According to jail sources, he was sent to Sylhet MAG Osmani Hospital for better treatment after he fell ill with various ailments including chest pain. After being taken there, the doctor on duty declared Mujibur dead.