Two explosive devices detonated at the finishing area of the 117th Boston Marathon. The first blast occurred at approximately 3 p.m. Monday, April 15. Headlines: Feds seek suspects, motive in Boston bombings; Local runners describe bloody streets.
Authorities identify 8-year-old Martin Richard as one of three victims killed during the explosions that took place in Boston on April 15. Martin was at the marathon to cheer on his father when the explosions occurred.
Krystle Campbell, a restaurant employee, was the second fatality authorities identified in the two blasts that took place Monday. In total, over 170 people were injured in the explosions.
The third Boston Marathon victim was identified as Lu Lingzi. She was a graduate student from China.
At 5:10 p.m. Thursday, investigators of the Boston marathon bombings release photographs and video of two suspects, Dzhokhar and Tamerlan Tsarnaev. They ask for the public's help in identifying the men.
Around 10:20 p.m. Thursday, shots are fired on the campus of the Massachusetts Institute of Technology in Cambridge, just outside Boston. An MIT officer is killed and a Boston-wide manhunt for the Tsarnaev brothers begins. Timeline of manhunt
After 8 p.m. Friday, Boston police surround a home in Watertown, locating Dzhokhar Tsarnaev hidden in a boat in Watertown, Mass. Earlier in the day Dzhokhar's brother, Tamerlan, died in a gunfight with police. Headline: Boston bombing suspect caught
A tweet at 8:58 p.m. Friday from the Boston Police Department indicates the second suspect, Dzhokhar Tsarnaev, 19, was captured after he had been discovered hiding in a boat in Watertown, Mass.
Revelers applaud and cheer as motorists pass at an impromptu celebration following the successful operation to capture 19-year-old bombing suspect Dzhokhar A. Tsarnaev on April 19, 2013 in Watertown, Massachusetts.