US: Explosion at Boston Marathon

Explosion at Coply Square, Boston. Photograph by Dan Lampariello

Two people have been killed and more than 23 were injured in two explosions at Coply Square, Boston, just as runners were coming to the finish of the Boston Marathon.

Dan Lampariello of Boston to a T caught the moment of the explosion on camera

Explosion at coply pic.twitter.com/EqKbGeWhha

— Boston to a Ⓣ (@Boston_to_a_T) April 15, 2013

Tyler Wakstein took a photograph of the aftermath of one of the explosions from a window above

What the fuck just happened? #bostonmarathon pic.twitter.com/Heko9U6r7P

— Tyler Wakstein (@theoriginalwak) April 15, 2013

The casualty numbers are still unknown as emergency services are still at the scene, but the explosions appear to have injured a number of people

Victims with lost limbs wheeled from scene. #wcvb

— Sean Kelly (@SeanKellyTV) April 15, 2013

There must be a hundred ambulances. #BostonMarathon pic.twitter.com/sLOTMN1jIf

— Darren Durlach (@DarrenDurlach) April 15, 2013

The Boston Globe has a video of the first explosion going off:

For UK readers and other people looking to find out information about family or friends in Boston, the crisis phone number is: 00 1 617 635 4500. The Red Cross and Google.org both offer person finding services to help people get in touch with their lost loved ones whilst phone services are disrupted.

GlobalPost has created a map showing the explosions on a map:

View Boston Marathon Explosion in a larger map