Editor's Note: A number of bombs were exploded today at the Boston Marathon with at least 22 reported injured.* Apparently the first two bombs went off at the finish line of the Marathon and a 3rd at the JFK library which is a few miles away.. This report comes from ABC News.

*Update: Today the Boston Globe reports:

"Doctors at two of Boston’s major hospitals said today that objects appeared to have been intentionally placed into the Boston Marathon bombs to inflict shrapnel wounds on the victims, underscoring the viciousness of an attack that killed three people and injured 176 others, including 17 who are still in critical condition."

- Les Blough, Editor

4:58 pm ET: No one has taken responsibility for attack, says Commissioner Ed Davis.

4:55 pm ET: There was also a controlled explosion on Boylston St., not one of the three incidents, says Commissioner Ed Davis.

4:53 pm ET: Police ask anyone with knowledge of attacks to call 1-800-494-TIPS

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4:51 pm ET: Determined there was a third incident at JFK Library around 4:20 p.m. Not certain if incidents are related, but treating them as if they are, says Davis. There are no known injuries from that event.

4:50 pm ET: Two explosions, 50 to 100 yards apart at the finish line at 2:50 p.m. “All victims have been removed from scene,” Boston Police Commissioner  Ed Davis said at a news conference.

4:49 pm ET: New York City Mayor Michael Bloomberg says security increased throughout that city.

4:48 pm ET: Massachusetts authorities confirm at least 68 patients transported to area hospitals.

4:41 pm ET: Boston Police are asking the public to turn over any video of the finish line explosion

Apr 15, 2013 3:27pm4:58 pm ET: No one has taken responsibility for attack, says Commissioner Ed Davis.

4:55 pm ET: There was also a controlled explosion on Boylston St., not one of the three incidents, says Commissioner Ed Davis.

4:53 pm ET: Police ask anyone with knowledge of attacks to call 1-800-494-TIPS

4:51 pm ET: Determined there was a third incident at JFK Library around 4:20 p.m. Not certain if incidents are related, but treating them as if they are, says Davis. There are no known injuries from that event.

4:50 pm ET: Two explosions, 50 to 100 yards apart at the finish line at 2:50 p.m. “All victims have been removed from scene,” Boston Police Commissioner  Ed Davis said at a news conference.

4:49 pm ET: New York City Mayor Michael Bloomberg says security increased throughout that city.

4:48 pm ET: Massachusetts authorities confirm at least 68 patients transported to area hospitals.

4:41 pm ET: Boston Police are asking the public to turn over any video of the finish line explosion.

4:38 pm ET:  “There is no sign of any radiological material involved in the explosion,” a federal source tells ABC News.

4:35 pm ET:  Two more explosive devices have been found near the scene of the explosion, according to the Associated Press.

 4:34 pm ET: Some 400 Massachusetts National Guard soldiers were on the scene for the marathon.

4:24 pm ET: A Federal law enforcement authority confirms to ABC News this was an intentional bombing, using small portable explosive devices.

4:21 pm ET: Boston police confirm they have found three more suspicious devices. One has been rendered safe.

 4:13 pm ET:  The FAA has issued a temporary flight restriction over the area of the explosion.

4:11 pm ET: Boston Fire Department to brief media at 4:30 p.m.  at Westin Hotel.

4:09 pm ET: Tufts Medical Center confirms that 9 victims have been taken there.

4:06 pm ET: Law enforcement authorities tell ABC News they are testing smoke and materials at the scene for chemical substances.

4:05 pm ET: Boston police confirm at least 22 injured, 2 dead.

At the moment ABC News has live, streaming coverage.

Source: ABC News