2 Explosions at the Finish Line Per USA TODAY feed.

FWIW, Copley Square could be considered a medium to high crime area. Prolly a drug deal gone bad.

Nothing substantiated by police other than "an Incident" but eye witnesses make it sound big.

It is not just an incident.

3 dead so far... 😞

This is not just an incident.

https://twitter.com/search?q=Boston%20Marathon&src=typd 

Don't click link if you got a weak stomach.

https://twitter.com/sabzbrach/status/323879303710404608/photo/1 

Now you have the FBI locking down a Cleveland Airport.

http://www.newsnet5.com/dpp/sports/football/browns/fbi-locks-down-cleveland-browns-owner-jimmy-haslams-pilot-flying-j-headquarters 

It's pretty bad here, not looking so good.

Unexploded bombs found and now they are evacuating the JFK library.

http://www.broadcastify.com/listen/feed/6254/web 

2 bombs have gone off so far, they are trying to clear the streets now. I was wondering why the statie drove by me so fast an hour ago. Some dead, lots injured, just watched the shot where the bomb went off. Not building take down size, but big enough to do lots of people damage.

Watching the news feed on the tube, they say some serious injuries.

Some news sources were speculating that there was another un-exploded bomb in one of the buildings that the local bomb squads were dealing with and suspicions of more...have called in every bomb squad member in the local area!

Just heard about this. Hope no friends or family were there. I will never understand peoples desire to hurt innocent civilians. Hell I don't understand the desire to hurt people in general, but at least in a war, against soldiers it makes a little sense. Attacking people gathering to watch a marathon? That's just vicious and cowardly.

2 dead, 22 injured at this time.

It's also April vacation here for the kids, lots of them there with their parents. Everyone was targeted, sick!

Man I hope they find whoever is responsible for this...

We're watching it from work 😞

God bless my brother EOD techs, the LE guys up that way are pretty good, and there are some labs I know of chomping at the bit to get any parts of the devices (if that's what these were) in their hands and exploit them around the clock.

All I will say about "work", but praying for the injured and the loved ones of the wounded and killed.

My cousin and my brother both used to work on that block. So glad they've both since relocated elsewhere.

BTW with that many people, I'm actually hopeful there are other devices. The scene looked so chaotic recoverying evidence will be hard.

Sorry if this seems unfeeling for those injured or killed, nothing I can do for them compared to the medical folks standing by at the end of a marathon. But exploited IEDs is my tradecraft, as is a lot of guys on here. GOD BLESS OUR EOD TECHS!