The 24 hours of the Boston manhunt

The teenage suspect in the marathon bombings was captured after an intense manhunt that resulted in a lockdown of the entire Boston metropolitan area.

FBI releases photographs

The FBI releases photographs and video of two men suspected of planting the pressure cooker bombs that killed three people and injured 176 at the Boston Marathon on Monday. Video footage shows a man known as suspect No. 1 wearing a dark baseball cap. He was later identified as Tamerlan Tsarnaev, 26.

FBI releases photographs

Suspect No. 2, later identified as Tsarnaev's brother, Dzhokhar, 19, was wearing a white cap backwards in the images. The 30-second videos are played repeatedly on national television, and photographs of the suspects are posted online.

Dzhokhar's page on Russian social networking site

Russian-language social networking site VK shows someone last logged out of what appears to be Dzhokhar Tsarnaev's page. The site had been accessed via mobile device.

Robbery before bombing?

Media cited authorities as saying the pair staged a robbery at a convenience store at the Massachusetts Institute of Technology campus, but state police said later they were not the ones who robbed the store.

Cop shot dead

Police discover MIT campus police officer Sean Collier, 26, shot multiple times in his car in an apparent confrontation with the suspects. He was transported to Massachusetts General Hospital and pronounced dead.

Suspects hijack car

Police say the two brothers hijack a car and abduct its owner for about a half hour before releasing him at a gas station where a security camera captures an image of someone who appears to be Dzhokhar Tsarnaev.

Tamerlan Tsarnaev shot dead

Police chase the car into the Boston suburb of Watertown. During the chase, the suspects throw explosives and exchange gunfire with police. Tamerlan Tsarnaev is hit during the shootout. He is taken into custody, and later pronounced dead.

Manhunt launched for suspect No. 2

A huge manhunt is launched for the second suspect and hundreds of police officers and FBI agents descend on Watertown.

Door-to-door search launched

Massachusetts police announce they will conduct a door-to-door search in Watertown. Citizens are warned to stay indoors.

Trains suspended

By 6 am, a heavy contingent of police reinforcements arrives in Watertown. At sunrise, they begin multiple sweeps through the streets. State police wear fatigues and carry sidearms and semi-automatic rifles. Some teams are accompanied by black armored trucks as they fan across neighborhoods.

Lockdown in Boston

Massachusetts officials announce they have expanded the shelter-in-place recommendations for the entire city of Boston, effectively putting the city in lockdown as they search for Tsarnaev.

Cops find suspects' car

Police say they have located a grey Honda with Massachusetts license plates in the Boston area that they believe had been occupied by a Boston Marathon bombing suspect.

Officials brief President Obama

Top security and counter-terrorism advisers finish an hour-long briefing with President Barack Obama in the White House Situation Room on developments in the Boston manhunt.

Manhunt intensifies

The search goes on, including with the help of Black Hawk helicopters. The manhunt covers 60 percent to 70 percent of the search area by afternoon, Massachusetts State Police Colonel Timothy Alben says.

Shootout in Watertown

Gunfire erupts in Watertown and police converge on a house where the suspect is believed to be hiding.

'Suspect in custody'

Boston police say they have captured the suspect alive and taken him into custody.