A code yellow weather warning has been issued by the KNMI as thick fog engulfed parts of the Netherlands overnight.
The warning is for parts of Drenthe, Groningen and Overijssel, under the new regional weather warning system, which was first used on Saturday.
Fog consumed other areas over the weekend, including Utrecht, Noord-Brabant and parts of Gelderland and Zuid-Holland.
Two freight ships collided on the Maas river near Den Bosch on Saturday morning. No one was reported injured but one of the ships was badly damaged, according to Omroep Brabant.
The alert went out on Monday morning at 2am and will last until around 10am when the mist has cleared.
Road drivers are being warned to slow down and take more distance while driving. Fog reduces visibility to within 200 metres in certain places.
