A suspected grenade exploded early Wednesday inside an Amsterdam courthouse shattering its windows, but no one was reported hurt.
The grenade exploded in a staircase of the Amsterdam District Court building at 2:30 a.m. local time, a police spokeswoman said, according to CNN. Windows on three floors of the courthouse were damaged by the force of the explosion.

Two men riding a motorcycle were seen driving away moments after the blast and police are now searching for them.

The motive of the attack on the E Tower housing the court is still being determined.

The court handles immigration and deportation cases on illegal immigrants. One case involved populist politician Geert Wilders, who was acquitted of inciting hatred of Muslims in June.

"We usually handle 40-50 cases a day - civil cases, criminal cases. We don't know if the explosion is related to any case. For today, we had no high-profile cases scheduled," Thesundaily.my quoted Anke Poul from the court's press office as saying. The court continues to work on the cases after the blast.

Meantime, Justice Minister Ivo Opstelten condemned the attack and vowed to find the perpetrators, according to local newspaper Telegraaf.