Photos show that the porch door of the building is outside. Second NH News Police believe someone purposely detonated it. No suspects have yet been arrested and police are appealing for witnesses.
At around 21:45, the police received a report of the explosion on the Oude-IJselstraat. In addition to the damage to the door, the explosion also caused a fire. It was quickly shut down, the police spokesman said.
The cause of the explosion is not yet known. Second NH News there was also an explosion on the street in 2016. Then a hand grenade was thrown at a house. A month later, the same house was the target of a shooting.