Established facts:
1. Two explosions occurred in a 100m area, the second explosion occurring 10s after the first.
2. An individual working for some unspecified Federal intelligence department speaking on the condition of anonymity stated that two other explosive devices were found and disarmed in the area.
3. There was a man on a rooftop at the time of the explosions.
4. A 20 year old, Saudi national, in the US on a student visa, was taken into custody after being tackled by a bystander for looking suspicious; this individual has shrapnel wounds to the back of his leg, and he "smelled like gunpowder".
5. An apartment was searched in Revere. The Saudi national in custody lives in Revere.
6. No terrorist organizations have claimed responsibility for this attack, at this time. The Pakistani Taliban have asserted that they were not behind the attack.
My biggest question is if these bombs were in trashcans, why is this Saudi national, if he is responsible for these attacks, on the scene and close enough to be wounded when they exploded? Remote detonation is not that complicated.