Explosion at Boston Marathon

[Gatecrasher]

mental scenes on sky news just now

http://www.bbc.co.uk/news/world-us-canada-22160691

[Hanny]

Grim stuff. 2 confirmed dead and over 20 injured. Reports a pipe bomb was the principle device.

Reports from AP that at least two more devices have been found and are bring disarmed. Unconfirmed reports of multiple devices found.

Story still developing.