At approximately 2:45pm, two explosions occurred almost simultaneously, roughly 10 seconds apart, causing extensive damage, injuring dozens and killing at least two. The bombs exploded at the 4:08-hour mark of the Boston Marathon; the bulk of the casualties were among spectators on the north side of Boylston Street. Boston Police Commissioner Edward Davis reports a third explosion at the JFK Presidential Library, 3.2 miles to the south, with unknown casualties. The reported explosion at the library may be a fire unrelateed to the explosions on Boylston Street. Unconfirmed reports indicate there were three additional suspect devices. Two of the suspect devices were found in the vicinity of the Grand Stand near the finish line.
The MSA Research and Intelligence Analysis Team has been closely monitoring the breaking situation, and has provided the following implications:
The nature of the explosion is difficult to ascertain from on-scenvideo footage. However, the devices likely contained a low explosive. There are reports of possible ball bearings dispersed at the scene. The simultaneous nature of the two explosions on Boylston Street and the use of anti-personnel materials may show signs of a trained bomb-maker. The first explosion may have occurred inside a local business based on the location of glass fragments on the sidewalk. The second explosion was approximately 550 feet west of the initial explosion. The explosive devices may have been detonated by fuse, timer or remote control.
Currently, there are no claims of responsibility by any group or individual. A review of extremist websites shows some support for the explosions but no specific claims of responsibility. Significant anniversary dates worth noting include:
- April 15, Tax Day
- April 19, Waco Siege, Oklahoma City
- April 20, Hitler’s Birthday
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(Image Credit: The Atlantic)