An explosion has damaged the headquarters of the largest party in the Dutch parliament, D66.
Police said a suspect had been arrested following the explosion, which happened at the party office in the centre of The Hague shortly after 9pm on Thursday.
There were no reports of fatalities or injuries.
Dutch Prime Minister Rob Jetten, who is also the leader of D66, said a bomb made of fireworks had been thrown through the letterbox in the front door of the building in what he described as "a cowardly act of intimidation".
The centrist, pro-EU D66 party in 2025 won the election in the Netherlands in a surprise victory over the far right Freedom Party led by nationalist Geert Wilders.
Its head office was also damaged during an anti-immigration protest in 2025, when protesters smashed the windows of the party seen by many on the far right as serving a progressive elite.