Dutch authorities have arrested 12 men of Somali origin they believe were about to carry out a terrorist attack, authorities said Saturday.
The country's intelligence service provided information that led to the arrests in Rotterdam, Public Prosecution Service spokesman Wim de Bruin told CNN.
No weapons or explosives were found, he said. The suspects are in police custody.
"The attack was said to be imminent so the national police started an investigation which led to the arrest of 12 Somalis later on Friday in Rotterdam," de Bruin said. "We are not sure about what the target was, how they were going to carry out the attack or when."
A Dutch counterterrorism office spokeswoman said the immediate threat to the country has been removed and the terror alert level will remain "limited," or relatively low.
"We are now following the information that comes out of the interrogations with these 12 individuals to see if there still remains a threat from this plot," said Judith Sluiter of the National Coordinator for Counterterrorism.
The men, between ages 19 and 48, were arrested in various locations. Police have searched a pawn shop, four homes and two hotel rooms, de Bruin said.