The Saudi national who was reported as "suspect" in the initial reporting is in fact a "witness", says Washington Post.
In the place of a foreign terrorist, therefore, we now have a possibility of the bombing carried out by "domestic terrorists", as in Boston Globe. The reasons? One, the explosive devices were too crude to be the work of Al Qaeda; two, Boston Marathon was accessible to everyone.
Definition of domestic extremists under the current administration is not what you may think.
And this from Local15TV.com (4/16/2013; part, emphasis is mine):
UM Coach: Bomb Sniffing Dogs, Spotters on Roofs Before Explosions
University of Mobile’s Cross Country Coach, who was near the finish line of the Boston Marathon when a series of explosions went off, said he thought it was odd there were bomb sniffing dogs at the start and finish lines.
"They kept making announcements to the participants do not worry, it's just a training exercise," Coach Ali Stevenson told Local 15.
Stevenson said he saw law enforcement spotters on the roofs at the start of the race. He's been in plenty of marathons in Chicago, D.C., Chicago, London and other major metropolitan areas but has never seen that level of security before.
"Evidently, I don't believe they were just having a training exercise," Stevenson said. "I think they must have had some sort of threat or suspicion called in."
CNN reports a state government official said there were no credible threats before the race.