Boston Police Commissioner Ed Davis
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Boston explosions: People warned to stay indoors

15 April 2013 Last updated at 22:33 BST

The commissioner of Boston Police has warned people to stay indoors after a series of explosions across the city.

Two people have been killed and 23 injured after two explosions at the finish line of the Boston Marathon while a third occurred at the JFK Library in the city.

Boston Police Commissioner Ed Davis said: "We are not certain that these incidents are related but we are treating them as if they are."