Boston PD: 3rd explosion at library

Published On: Apr 15 2013 05:04:33 PM EDT
BOSTON -

Boston police say there's been a third explosion in the city, following two blasts near the finish line of the Boston Marathon that killed two people and injured many others.

Police Commissioner Edward Davis says authorities aren't certain that the explosion at the JFK Library was related to the other blasts, but they're treating them as if they are.

David says there are no injuries stemming from the third explosion.

He urged people to stay indoors and not congregate in large groups.