Passengers of the Viking Idun were jolted out of their beds in the early hours of the morning, after their vessel collided with another ship.
The river cruise from Antwerp to Gent had been carrying 171 passengers on a 10 day itinerary though Belgium.
Pictures show both ships were damaged in the incident shortly after midnight on the seventh day.
The local newspaper Provinciale Zeeuwse Courant reported the incident near Terneuzen resulted in serious damage to the cruise ship's bow and large tears to the hull of the oil tanker.