Early reports are often misleading, and there will be time enough for politics when the facts are in. But we know this much, so far: there were multiple explosions around the finish line of today's Boston Marathon, there are a number of people dead and many horrible injuries, and authorities confirm there were multiple bombs. The Marathon is a huge target - a ton of people on hand, as Patriot's Day is one of Boston's biggest holidays of the year. We have no facts yet sufficient to say who did this or why, so for now we can only pray for those affected.
There is time for mourning. Then, with due deliberation, there can be time for anger.