The bomb could have been dropped during the Liberation War of 1971, experts said.
Workers saw the cylinder-like bomb while digging for the third terminal in the morning, Dhaka airport Deputy Director Beni Madhab Biswas said.
Next, the bomb disposal unit of the Bangladesh Air Force went to the spot and defused it.
Later, the bomb was taken to the Bangladesh Air Force Base Paharkanchanpur for disposal.
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