The victims are all builders that were working at the docks. The accident happened at around 8pm on Thursday evening.
The search and rescue operation was hindered by difficulties locating the wreckage. The bodies of a total of five men were eventually fished out of the icy cold waters of the dock.
The accident happened on the New Yorklaan, a part of the docks that is not accessible to non-dock traffic. The exact cause of the accident is not yet clear. The judicial authorities have launched an investigation.