Two explosions at the finish line of
the Boston Marathon race have left
an unknown number of people
injured.
Video and photographs from Boston
show a scene of confusion, with
emergency services descending on the
scene and bloodied spectators being
taken to a medical tent.
"There are a lot of people down," said
one runner quoted by AP news agency.
The incident reportedly came about
three hours after the winners crossed
the line.
AP said there was a loud explosion on
the north side of Boylston Street, just
before the bridge that marks the finish
line. Another loud explosion could be
heard a few seconds later.
Stragglers heading for the finish line
were rerouted away from the smoking
site of the blasts.
The Eastern Massachusetts branch of the
Red Cross has set up a disaster response
centre in the area.

m.bbc.co.uk/news/world-us-canada-22160691