Boston Marathon Bomb Blasts 2 Dead, 23 Injured -- Not Clear Who's Responsible

1:08 PM PT -- Police now say at least two are dead and 23 are injured. The AP is reporting that two additional explosive devices have been found.

12:59 PM PT -- Boston Marathon officials are now calling them bombs. There are reports of police responding to additional undetonated devices in the area, but nothing's confirmed. The BPD has called in all off-duty officers.

12:50 PM PT -- The New York Post is now saying at least 12 people are dead.

12:40 PM PT -- Three people have reportedly been killed by the explosions. Dozens have reportedly been injured. Some are saying they were bombs ... but that hasn't been confirmed. There's blood everywhere.

Terrible news ... a pair of explosions rocked the finish line of the Boston Marathon this afternoon ... and the injuries are gruesome. 

It's total chaos right now ... no one knows how many might be killed or injured, but the photos going around don't look good. It's still not clear who's responsible.


Olympic swimmer Summer Sanders just tweeted, "Can anyone tell us what happen near the marathon? Felt two BIG booms that shook our hotel and saw smoke on Boylston." Twitter is on fire ... read other
New Kids on the Block member, and Boston native, Joey McIntyre was running in the race and just tweeted that he crossed the finish line just ahead of the dual blasts.

"There was an explosion by the finish line about 5 minutes after I finished- I'm ok but I'm sure there are many hurt," he tweeted. (Above is a selfie he took at the starting line).


Story still developing ..