A police officer reportedly shot family members before turning the gun on himself, according Dutch newspaper de Telegraaf, citing sources involved in the investigation. Emergency service teams are at the scene and a home in the neighbourhood had been cordoned off. Police said on Twitter: "Three people were killed in the shooting incident in Dordrecht's Heimerstein (neighbourhood). One person was seriously injured.

The police could not immediately be reached to provide additional details.

Earlier, they could not confirm reports from local media that three people have been killed.

The police said in a tweet: “At a shooting incident on the #heimerstein in #Dordrecht several victims have fallen.

“We are present with many people and are investigating what happened.”