Boston Marathon Explosions: At Least 2 Killed, 23 Injured

Two explosions hit the Boston Marathon as runners crossed the finish line on Monday, killing at least two people and injuring 23 on a day when tens of thousands of people pack the streets to watch one of the world's best known marathons.
Boston police also reported another explosion at the John F. Kennedy Presidential Library, which is three miles from the marathon's finishing line.
The blasts at the marathon took place about three hours after the winners crossed the line, with one explosion on the north side of Boylston Street, just before the photo bridge that marks the finish.
Another happened a few seconds later, about 50-100 metres away.
Some runners were making their way across the finish line as the drama unfolded, and TV helicopter footage showed blood on the pavement in the popular shopping and tourist area known as the Back Bay.

"We are not certain that these incidents are related, but we are treating them as if they are," Boston Police Commissioner Ed Davis told a news conference.
Boston police said two people were killed and 23 injured in the explosions on the marathon scene.
Two high-level U.S. law enforcement officials said one or more bombs were responsible for the explosions.

It is not known what caused the blasts but Fox News reported ball bearings have been found on the street.

There are also reports that police have discovered unexploded devices in the area.
Some runners who had not finished were diverted down Commonwealth Avenue and into a family meeting area, according to an emergency plan.
The Federal Aviation Administration has warned pilots it had created a no-fly zone over the site.

Source: Sky News, Reuters.