They just released his name...
WASHINGTON — FBI agents arrested a Portland, Ore., man Thursday as part of the investigation into the deadly train bombings in Spain, federal officials said.
Brandon Bieri Mayfield, a U.S. citizen, was taken into custody on a material witness warrant, said a senior law enforcement official, speaking on condition of anonymity. The arrest is the first known in the United States with connections to the March 11 bombings in Madrid.
The FBI also searched the man's home, which he shares with his wife, the official said.
Material witness warrants, usually kept confidential by a federal judge, are used by the government to hold people suspected of having direct knowledge about a crime or to allow time for further investigation into the witness.
Officials would not provide any further details about the man or his alleged connection with the Madrid bombings, which killed 191 people and injured 2,000 others. Spanish authorities blame the attack on Islamic extremists, possibly linked to Al Qaeda.
Eighteen people have been charged to date in Spain — six charged with mass murder and the others with collaboration or with belonging to a terrorist organization. The FBI and other U.S. agencies have warned that Al Qaeda or its sympathizers might attempt to attack mass transit systems in major U.S. cities this summer.
Earlier this year, in Portland, the last of six men and a woman were sentenced on charges of conspiring to wage war against the United States by helping Al Qaeda and the former Taliban rulers of Afghanistan.
http://www.foxnews.com/story/0,2933,119243,00.html