Here's a look back at the five-day timeline of events, from the first explosion at the Boston Marathon, leading up to Friday's manhunt.
On Monday, two bombs went off within seconds of each other near the finish line of the Boston Marathon on Monday, just before 3 p.m. Boston time.
That night, three people were confirmed dead and dozens were seriously injured.
By Wednesday, the FBI released pictures of the bombs, giving a better idea of what was in them, including BBs and nails contained in pressure cookers.
Thursday afternoon, the FBI released photos and video of the two suspects, asking for the public's help in identifying them.
At night, shots were fired on the Massachusetts Institute of Technology in Cambridge, just outside of Boston. One officer was confirmed dead after being shot multiple times.
Two armed men carjacked an SUV in Cambridge, holding the driver hostage for about a half hour before letting the driver go. Police pursued the vehicle and the suspects inside threw out explosive devices during the chase.
A shootout ensued, with one of the suspects hit. He was pronounced dead and identified as Tamerlan Tsarnaev.
A manhunt began for his 19-year-old brother, Dzhokhar Tsarnaev.
Around 8 a.m. Friday Boston time, the police commissioner said all residents must stay in their homes as they search for the surviving suspect.
Three hours later, state police announced they would be going door to door in Watertown, outside of Boston, in search of the suspect.
Around 6 p.m. Tucson time, the suspect was captured with two gunshot wounds in his neck and leg.
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