Update 6:50pm – Governor Deval Patrick and Mayor Thomas Menino announced attorney Kenneth Feinberg as the Administrator of The One Fund Boston. Feinberg is considered one of the world’s foremost experts on victim compensation, having recently administered both the September 11th Victim Compensation Fund and the BP oil spill fund. He is a native of Brockton, Mass.

Update 4:28pm – The planned 5pm press conference has been canceled, with authorities citing the Courthouse bomb scare.

Update 3:33pm – An update on the crime scene, via the city’s Twitter account:

As of 3 PM on Wednesday, Belvidere Street and Dalton Street will be opened to the public. This will allow access to the hotels in the area. Also, Boylston Street will be opened between Massachusetts Avenue and Hereford. Hereford will also be open. Clarendon Street will continue to be open across Boylston but no turns will be allowed on to Boylston.

Update 3:22pm – Firetrucks have arrived at the Courthouse, as seen in the image above.

Update 3:12pm – Globe metro editor tweets “All clear at the Brigham. Man left locked car at valet. Gas cans in back, according to official source”

Update 3:09pm: The Boston Globe is reporting that Brigham & Women’s hospital is also being evacuated.

Update 3:07pm: The federal courthouse is being evacuated right now.

Update 2:53pm – The FBI and state police have both confirmed that no arrest has been made.

Update 2:32pm – The Boston Police has clarified that no arrest has been made. 

Update 2:22pm – Our reporters Alex Weaver and Kyle Clauss are over at the Courthouse. Above, the scene from their eyes.

Update 2:18pm – There are conflicting reports as to whether the individual in question has actually been arrested. CNN has reported as much, but NBC and the AP have not yet gone that far.

Update 2:12pm – All eyes are on the Moakley Courthouse, where we expect the arrested individual is being or has been taken. We have reporters on their way now.

Update 2:09p.m.: [Walt Frick editing] Following a reported arrest in association with the marathon bombings we will continue updating this post live.

Update: CNN’s Fran Townsend said once a suspect is in custody, officials will ask: “Are there other devices and where are they?”

Update: Officials report that an arrest has been made in connection to the Boston Marathon bombing.

Update: Lord & Taylor department store on Boylston St. reportedly offered surveillance footage crucial in latest development toward potential identification of suspect.

Update: In what’s being touted as “a significant breakthrough,” CNN reports that Boston police may have identified a possible bombing suspect, citing nearby department store video footage and TV station footage as helpful sources. No other details at this time.

Update: White House Press Secretary Jay Carney: “It is very important that we allow this investigation to run its full course.”

Update: CNN reports that “there is no indication” that the letter intended for the White House that has reportedly tested positive for Ricin was connected in any way to the bombings in Boston.

Update: Boston.com has published a list of confirmed bombing victims and will continue to update their information as more details come in. The full list can be accessed here.

Update: FOX 25 Boston and its sister station FOX 5 Atlanta have new photos of what’s left of the first bomb that detonated at the finish line, including the pressure cooker lid an d “what appears to be a black, padded knapsack or duffel bag” possibly used to transport the device or devices. See all six images below:

Update: Various television news outlets and the New York Daily News have reported that the third deceased bombing victim is Boston University graduate student Lu Lingzi, reportedly confirmed by her father to The Shenyang Evening News. 

Update: Tales of heroism continue to emerge, the selfless acts of those individuals who fled toward the blast victims instead of away. One such person is Dr. Natalie Stavas, a pediatric resident at Boston Children’s hospital who ran to victim’s aid after running the marathon herself. Watch her interview with CNN’s Anderson Cooper below:

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It’s now the second day after the bombings at the finish line of the Boston Marathon that took place around 2:50 p.m. on Monday, April 15. There’s been a flood of information as authorities, participants and civilians the world over scramble to make sense of what happened. More than 170 people were injured from the blasts — at least one of which is thought to have originated from a 1.5-gallon standard kitchen pressure cooker packed with shrapnel and set with a timed detonator. The three people killed have been identified as 8-year-old Martin Richard of Dorchester, Krystle Campbell, 29, of Medford, and an unidentified Chinese national graduate student who attended Boston University.

The FBI and local officials are working over the blast radius, a swath of debris and crimson-stained pavement Boston Police Commissioner Ed Davis has called “the most complex crime scene that we’ve dealt with in the history of our department.” Remnants of the alleged pressure cooker bomb have been found, including a mangled piece of the container and a partial circuit board, thought to have links to the device’s means of timed detonation.

In a new development this morning, CNN reports the suspected lid of the device was found on a nearby rooftop, a piece of evidence that could help the investigation move forward, but doesn’t, on its own, bring authorities any closer to a specific suspect.

Perhaps the biggest development of this case so far is the lack of progress toward naming a suspect. FBI Special Agent in charge Rick DesLauriers is urging everyone with video and photographs of the scene to send them to authorities in hopes clues can be stitched together from what’s already a dizzying collection of digital information. Still, Governor Deval Patrick and others have stressed that we’re in the early stages of what could be a long road toward any concrete answers.

For a complete overview of everything we’ve learned up to this point, please see our comprehensive coverage here.