http://atlasshrugs2000.typepad.com/atlas_shrugs/2013/04/jihadist-arrested-in-horrific-boston-marathon-bombing.html?utm_source=twitterfeed&utm_medium=facebook
That's based on the NY Post and a false headline (Even the Post didn't say the Saudi was arrested.)
There's absolutely no source for the Saudi National story other than the NY Post.