Three people have been killed in a shooting in the Dutch city of Dordrecht, police say.
A fourth person has also been seriously injured in the incident in the Heimerstein district.
De Telegraaf newspaper reports that the gunman was suspected to be a policeman and the incident was a family shooting but this has not been confirmed.
Images on Dutch media showed emergency vehicles surrounding a residential area.
A tweet by Rotterdam police confirmed the fatalities and said officers would provide further details as soon as possible.
Dordrecht’s mayor, Wouter Kolff, also took to Twitter to express sympathy for those involved and said he would travel to the scene later on Monday.
Dordrecht is about 20km (16 miles) south-east of Rotterdam and has a population of some 120,000.