(CNN)An explosion rocked a residential area of The Hague in the western Netherlands on Sunday, trapping several people beneath the rubble, according to the local Fire Brigade.
It was not immediately clear what caused the blast, but Dutch police said it was a "presumed gas explosion." According to CNN affiliate RTL, the explosion caused the front of a house to collapse.
At least three people have been saved from the rubble, the Dutch city's Fire Brigade tweeted, but at least one person remains trapped.
Nine people were injured and sent to seven hospitals, a subsequent tweet said, but it did not say whether more people had been rescued.
The Fire Brigade also said that the surrounding homes had been deemed "unstable."
The third-most populous city in the Netherlands, The Hague lies on the North Sea and is home to about half a million people.