Update from Bloomberg: Boston Police says no suspects are in custody. Could it be that even the venerable NYPost got something wrong? Or is the Boston PD merely making a distinction between someone in custody (i.e., arrested) and someone guarded as a possible suspect? We should find out soon.

Just a brief blurb at the NY Post for now (which may have been overzealous in reporting the number of casualties earlier) but for what it's worth:

Authorities ID'd a suspect in marathon bombings - he is being guarded in Boston hospital.



Authorities have a identified a suspect, who is currently being guarded in a Boston hospital with shrapnel wounds.

Unclear how much credibility to assign to this, but that's what is being reported. We will provide more info if and when we see it. Some more via twitter, where we learn that according to CBSNews, police have surveillance video a person bringing multiple backpacks into the area 20 or so minutes before the explosions.

The NY Post has released more, such as the nationality of the suspect: Saudi.