Boston Marathon blasts

April 15, 2013 

Two bombs exploded in the crowded street near the finish line of the Boston Marathon, killing two people and injuring more than 130 others. The explosions occurred about four hours into the race and about three hours after the men's winner crossed the line. By that point, more than 17,000 of the runners had finished the race, but thousands of others were farther back along the course.

Attacks and threats affected sporting events in history

Runners continue to run towards the finish line of the Boston Marathon as an explosion erupts near the finish line of the race in this photo exclusively licensed to Reuters by photographer Dan Lampariello after he took the photo in Boston, Massachusetts, April 15, 2013. [Photo/Agencies]

Attacks and threats affected sporting events in history

An injured man in a wheelchair is taken from the scene after explosions went off at the 117th Boston Marathon in Boston, Massachusetts, April 15, 2013. [Photo/Xinhua]

Live report on the Boston Marathon blasts