What the hell?

twitter saying 2 dead, 23 injured, 10 of those with emergency amputation.

What an awful thing to happen, especially at a marathon

There are some seriously sick people in this world. What a horrible thing to do and how awful for the people caught up in it all.

People get blown up by the hundred every day. Whether it's an Iraqi market, Afghan policemen or Boston runners, this sick psychotic behaviour is probably the signature of modern times. We are infested with sick ideologies, and it will only get worse. It's just a footnote in a severely depressing roll-call of ideological carnage without end. And don't worry, whatever scum are responsible, you'll find plenty - maybe even some on here - who will apologists for it.

There's already talk of ramping up security for the London marathon, but ateotd you can never stop the nutters, and whatever extra disruption they cause is viewed by them as a bonus.

I don't have any answers. All I expect is regular doses of the same, for the foreseeable, as well as mudslinging as to why it wasn't prevented, and doubtless conspiracy theories that Bush did it.

What a mean old scene.

There are already conspiracy theories that it was done by North Koreans and that it was done by the US Government so they can blame it on the Koreans.

But still, innocent people, people out completing a marathon for charity have been injured and killed. It's not right and it's not nice.

Odd timing - you would have thought if someone was going for maximum impact they would have timed it to coincide with either the elite athletes finish, or between three and four hours when the bulk of the fun runners are going to be coming in.

Very early to start jumping to conclusions about the who and the why, not that it'll stop folk from doing so.

Third explosion now.

I wonder how many old Bostonians gave any thought to potential consequences when they were actively contributing to "the cause" during the 70s & 80s?

Or attack the start of the race, when everyone is in the same place.

Terrible scenes, my heart goes out to all those involved or affected.

There's some seriously sick people we share this planet with.

According to the BBC's correspondent, there was due to be a controlled explosion as a further device had been found.

the JFK library was a fire not an explosion, apparently unrelated

i have little faith left in the human race to be honest.

the world is mad, with violence by the bucket load the norm.

reports circulating that one individual finished the marathon then insisted he was taken to the hospital to donate blood. what a star.