A prisoner of Sunamganj jail died on Friday morning.
The deceased was identified as Khalil Mia, son of Shahid Mia.
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Sunamganj Jail authorities said Khalil was rushed to Sadar Hospital after he felt chest pain in the afternoon.
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After being taken to the hospital doctor declared him dead.
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The body has been sent to a morgue for autopsy, said Jail Superintendent Nurshed Ahmed.
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Khalil was accused in an under trial robbery case, he said.
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