Swedish police said they arrested four terror suspects in the western city of Gothenburg early Sunday. The TT news agency said the country's National Task Force, a specialized police unit, swept into a part of the city and cordoned it off around midnight.
An art gallery hosting an opening party was ordered evacuated as barriers were erected in the vicinity, the report said.
Police released no details of the arrests.
Sara Kvarnstrom, a spok
eswoman for the Swedish Security Services, was also tight-lipped about the operation.
"There's no cause for the general public to be concerned," she said.
In October, after two people were arrested on charges of plotting a bombing in Gothenburg, federal security officials said some 200 Islamic militants were known to be in the country, CNN said.
The arrests came on the 10th anniversary of four al-Qaida suicide aircraft attacks on the United States.
