One marathon suspect has been captured, according to an official with knowledge of the investigation.

Another remains on the loose in Watertown after a firefight with police. Authorities have established a 20-block perimeter as they search for him.

Via Boston Globe: http://www.bostonglobe.com/metro/2013/04/18/mit-police-offic...

Does this source seem accurate? Remember that the globe AND CNN previously claimed an arrest in the marathon bombings had been made and it was incredibly embarrassing.