Twelve Somali men have been arrested in the Netherlands on suspicion of involvement in terrorism.
The men were detained late on Friday in Rotterdam, and were thought to be planning an attack within the Netherlands, Dutch prosecutors said.
Five of the men were released on Sunday.
A shop and four houses were searched in Rotterdam and two hotel rooms in a southern town, prosecutors said. No weapons or explosives were found.
In a statement, prosecutors said the 12 were aged between 19 and 48.
Six of the men arrested lived in Rotterdam, five had no known address and one was a Danish resident, the prosecutors' statement said.
The arrests were made after a tip-off from Dutch intelligence services that a number of Somalis were preparing to mount an attack in the near future.
Officials said of the five released men that there was no criminal evidence against them.