Oregon police are on high alert after shots were fired at the US district courthouse in Eugene over Wednesday night. Three of the four shots hit the windows of Democratic Rep. Peter DeFazio's office, although FBI investigators say they're not sure if his office was the intended target. No one was injured. "Right now, our biggest concern is determining why this happened," an FBI spokeswoman told the Register-Guard. "We're obviously taking this very seriously." (More Peter DeFazio stories.)