SEATTLE -- A federal affidavit says the FBI's Joint Terrorism Task Force tracked Portland anarchists to Seattle, where they joined the May Day protests and are suspected of attacking the federal courthouse.
The Seattle Times reports the Oct. 3 search-warrant affidavit was mistakenly unsealed in U.S. District Court in Seattle on Thursday and quickly resealed.
It identifies six suspects, but none have been charged.
The Times says the warrant makes clear that state and federal agents were watching some members of the small group of Portland anarchists even before May Day.
According to the document, they're suspected of committing crimes, including conspiracy, destruction of government property and interstate travel with intent to riot.
May Day began with peaceful demonstrations in downtown Seattle, but quickly turned violent when group of protesters dressed in black marched through downtown smashing store windows and vandalizing cars.