Police were called to the scene at 01.23 after something exploded outside an entrance gate to the house. No injuries have been reported and the national bomb disposal unit is on its way to the scene, the police state on their website.
The case is classified as public destruction.
An hour earlier, patrols had been alerted to an apartment at Västra Gärdet in Falkenberg after a suspected dangerous object was thrown into the apartment.
The object has not exploded and the National Bomb Squad is on its way to the scene to investigate. The police have started an investigation regarding attempts at public destruction.