You’ve probably seen this now iconic photo of three Boston police officers and a man knocked down by the blast just after the bombs went off. As noted earlier, the man in question, 78-year-old Bill Iffrig of Lake Stevens, Washington, was a bit bruised but otherwise unharmed.

After the jump, a video interview this evening with Iffrig, just released by ESPN … Read More

We don’t know definitively. There are still various loose ends and stories that aren’t totally nailed down. But after a day of reports it now seems possible and actually quite probable that there were only two explosive devices today: the two reported from the start right near the finish line of the marathon.

Authorities appear to have backed off earlier claims about an explosion at the JFK Library and reports that other explosive devices were found in the vicinity of the initial blasts. Again, not definitive. But that’s the surest information that we have at this point.

The antis in the Senate seem to be firming up their numbers, putting the compromise background check bill in jeopardy.

Boston authorities are scheduled to hold another press conference at 8:30 PM. Live feed here.

There’ve been a flurry of contradictory reports this afternoon about whether someone was arrested, determined to be a suspect, questioned or something else after today’s attack in Boston. I’m going to try to review all the different reports and give you as best a read as I can of what we know at this moment. Read More

One of the two confirmed fatalities in today’s attack is an 8 year old boy.

President Obama will address the country at 6 PM (20 minutes from now), according to Sen. Majority Harry Reid.

5:50 PM: Confirmed by White House.

605 PM: Live video feed here.

FBI is no-commenting reports that there is a person or suspect in custody in Boston. This comes after the Boston Police knocked down press reports to that effect.

Obviously there’s a lot of confusion and conflicting accounts at the moment. So we’re going to tell you exactly what we’ve been told by relevant authorities: The Boston Police Department said and still says they know nothing about an arrest. The FBI, however, is declining to comment on the report. Obviously these are not necessarily conflicting reports. It is also possible that federal law enforcement knows things that local law enforcement does not.

5:53 PM: NBC has now confirmed part of the substance of the New York Post account …

Officials say that Boston PD are “guarding” a wounded man at a Boston hospital as a “possible suspect” – @jimmiklaszewski

— NBC News (@NBCNews) April 15, 2013

We’ll let you know more when we hear it.

Secret Service expands security perimeter around White House.

Boston Police say no arrests, no one in custody, contrary to press report.