Boston bombing: What we know

 

AP: Matt Rourke. Boston bombing suspects: Police in tactical gear conduct a search for a suspect in the Boston Marathon bombings.

8 min ago By MSN with wire reports

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Two bombs exploded near the finish line of the Boston Marathon, killing three people and injuring more than 180. Here's a look at the latest details of the investigation.

Editor's note: Updates to this story are ongoing, check back for more details.

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Latest developments: Police killed one Boston Marathon bombing suspect in an overnight shootout and searched house-to-house for his brother on Friday, with much of the city and surrounding communities under virtual lockdown.
During the bloody and dramatic night a university police officer was killed, a transit police officer was wounded and the suspects carjacked a vehicle before leading police on a chase that resulted in one of them being shot dead.
The man still on the loose was identified as Dzhokhar A. Tsarnaev, 19, and the dead suspect was his brother, Tamerlan Tsarneav, 26, authorities said. The brothers were from the Russian region near Chechnya, which has been plagued by an Islamic insurgency stemming from separatist wars. They had been in the United States for several years, officials said.
The men's uncle told The Associated Press that the brothers lived together near Boston and have been in the United States for about a decade.

AP: Federal Bureau of Investigation. This photo released by the Federal Bureau of Investigation shows a suspect that officials identified as Dzhokhar Tsarnaev, being sought by police in the Boston Marathon bombings Monday

After the shootout, authorities launched a manhunt for Dzhokhar A. Tsarnaev in the Boston suburb of Watertown. Heavily-armed police are conducting a house-to-house search inside a 20-block area.
The developments came after the FBI on Thursday released photos and video of two suspects in the bombing and appealed to the public for help in identifying them. The younger suspect was seen in video wearing a white hat and setting down a backpack at the site of the second explosion at Forum Restaurant.
The suspects: Tamerlan  and Dzhokhar Tsarnaev were described by law enforcement officials as brothers from the Russian region near Chechnya.
An uncle, Ruslan Tsarni of Montgomery Village, Md., told The Associated Press that the men lived together near Boston and have been in the United States for about a decade.
In May of 2011, Dzhokhar A. Tsarnaev, then a senior at a prestigious high school, was awarded a $2,500 scholarship from the city of Cambridge, Mass., to pursue higher education.
Dzhokhar Tsarnaev's page on the Russian social networking site Vkontakte says he attended Cambridge Rindge and Latin School, graduating in 2011, the year he won the scholarship, which was celebrated with a reception at City Hall, according to a news release issued at the time. Before moving to the United States, he attended School No. 1 in Makhachkala, the capital of Dagestan, a predominantly Muslim republic in Russia's North Caucasus that has become an epicenter of the Islamic insurgency that spilled over from Chechnya. On the site, he describes himself as speaking Chechen as well as English and Russian. His world view is described as "Islam" and he says his personal goal is "career and money."
According to the website spotcrime.com, Tamerlan was arrested for domestic violence in July 2009, after assaulting his girlfriend.
He was an amateur boxer, listed as a competitor in a National Golden Gloves competition in 2009.
Boston on lockdown: In Boston and its western suburbs, authorities suspended mass transit and urged people to stay indoors as they searched for Dzhokhar A. Tsarnaev. 
Authorities urged residents in Watertown, Newton, Arlington, Waltham, Belmont, Cambridge and all of Boston to stay indoors. All mass transit — including buses, subways, trolleys, commuter rail and boats — was shut down, and businesses were asked not to open Friday. People waiting at bus and subway stops are being instructed to return home. Schools, including Harvard and MIT, were closed on Friday. Taxi service in the City of Boston was also suspended.
The FAA shut down airspace over the Boston manhunt area, Reuters reported.
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The victims: Three people were killed: 8-year-old Martin Richard, 29-year-old Krystle Campbell and Boston University graduate student Lu Lingzi of China. Storylines are emerging from those injured.
Hospital update: At least 10 Boston area hospitals treated more than 180 patients, and seven were still in critical condition Thursday. Dozens of patients have been released. Officials expect all of their patients to survive. 

• Boston Medical Center: Trauma surgery chief, Dr. Peter Burke, said that the hospital treated 23 people. A 5-year-old boy who was in critical condition is now doing well and is expected to recover. One person is still in critical condition.
• Massachusetts General Hospital: All but 11 of the 31 people sent there have been released. Four were still in critical condition.
• Boston Children's Hospital: Ten patients were sent there, three remain. A 2-year-old boy with a head injury is in good condition; a 10-year-old boy with multiple leg injuries is in critical condition and a 9-year-old girl with a leg injury also is in critical condition.

Memorial: President Barack Obama and Mitt Romney were among those who attended a Boston interfaith healing service on Thursday.    
After rumors emerged that members of the Westboro Baptist Church were going to protest the funerals of those killed in the bombings, hundreds of Bostonians formed a human wall to keep them out. Boston Magazine reported that the group congregated near a community vigil to show support for victims and families impacted by the bombings.

More from MSN News: Photos: Boston Marathon explosions Witnesses to the bomb blasts | Video: Witnesses describe the horrific scene Gallery: Boston Marathon aftermath