Three workers died as the sand-laden bulkhead capsized in the Arial Kha river in Shibchar upazila of Madaripur district on Monday.
The identities of the deceased could not be known immediately.
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Md Masum Alam Khan, superintendent of Madaripur Police, said the bulkhead sank in the river around 4 pm.
Three workers of the bulkhead went missing during the incident.
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On information, a team of river police rushed to the spot and recovered the bodies from Char Kamarkandi area in the river.