A 50-year-old unidentified man was found dead near Bangabandhu National Stadium gate-3 in Paltan area of the capital on Thursday.
Local people spotted the man unconscious around 10:20 am and informed police, said Sub-Inspector of Paltan Police Station, Md Babul.
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Later, he was taken to Dhaka Medical College and Hospital (DMCH) where the doctors declared him dead, he said.
The body was kept at the DMCH morgue for autopsy.