The victims were members of a 7-man group working on a World Bank project.
The men were on a World Bank assessment mission which commence on Tuesday, August 23, 2016, when their boats capsized, Daily Post reports.
Seven persons were on-board the boat when the incident happened.
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The surviving three got lucky because they wore a life jacket, which prevented them from drowning, while the other four without safety wears unfortunately kicked the bucket.
The son of a World Bank contractor, whose name was not disclosed is reportedly one of the victims.