[Updated, 10:30 p.m. ET] Two men seen in images near the finish line of Monday's Boston Marathon - moments before two bombs there exploded - are of "high interest" and are considered "possible suspects," a law enforcement official said.
A circular sent out Wednesday by authorities indicated the attached photos, showing the two men, were being sent around "in an attempt to identify the individuals."The official said the men were of interest because of where they were at a particular time and what they were carrying. One of the men is seen carrying a black backpack.
The source said that authorities had not yet identified the two men by name and that the photographs were not being released to the public for fear of impeding the investigation.
Updated at 9:27 p.m. ET] As of Wednesday night, Boston-area hospitals had released 112 of the 178 treated for injuries sustained in the marathon attack. Thirteen patients are in critical condition, the same number as was reported earlier in the day.
[Updated at 7:32 p.m. ET]Â The FBI has cancelled its Wednesday news briefing, the Boston police announced. Minutes earlier, police had said the federal agency would make a "brief statement" on the marathon case.
[Updated at 6:09 p.m. ET] "Every hour we're closer" to finding  the person or people responsible for Monday's twin bomb blasts at the finish line of the Boston Marathon, Massachusetts Gov. Deval Patrick told CNN's Wolf Blitzer on Wednesday.
[Updated at 5:45 p.m. ET] As of late Wednesday afternoon, Boston-area hospitals had released at least 103 of the 178 people treated for injuries sustained in Monday's attack near the Boston Marathon's finish line, according to a CNN tally.
Thirteen of those still hospitalized remain in critical condition, hospital officials said.
[Updated at 4:40 p.m. ET] A news conference about the Boston Marathon bombings that had been scheduled to begin at 5 p.m. has been postponed.
[Updated at 4:08 p.m. ET] Authorities investigating this week's attack want to question a man who was seen, on video, wearing a white baseball cap as a possible suspect in the case, two official sources with knowledge of the investigation told CNN.
One of the sources said the man had the hat on backwards and was wearing a light-colored hooded sweatshirt and a black jacket. The second source said that investigators have not identified this person.
[Updated at 2:58 p.m. ET] The FBI said in a statement Wednesday that no arrest has been made, "contrary to widespread reporting," tied to Monday's Boston Marathon attack.
Before that, following statements from the Justice Department and the Boston police that no arrest has been made, CNN's John King said this:
A federal law enforcement source told him that there has been "significant progress but no arrest." A Boston law enforcement said "we got him," but didn't clarify whether that means authorities have identified a suspect or arrested one.
Some federal sources say that even to say the suspect has been identified goes too far, but several sources in Boston say they have a clear identification.
[Updated at 2:48 p.m. ET] There have been no arrests in the Boston Marathon bombing investigation, according to Boston police and the Justice Department.
[Updated at 2:33 p.m. ET] There is conflicting information as to whether someone has been arrested in connection with the Boston Marathon bombings.
A federal law enforcement source told CNN's Fran Townsend that someone was arrested. But two senior administration officials and another federal official then told Townsend that there had been a misunderstanding among officials and that no one has been arrested.
[Updated at 2:23 p.m. ET] As news of an arrest spreads, a crowd has been gathering outside a federal courthouse in Boston.
[Updated at 2:10 p.m. ET] The last we heard, a law enforcement news briefing in the bombings case was scheduled for 5 p.m. ET today. We'll see if that holds.
Earlier today, CNN's John King reported that authorities had identified a suspect based on an analysis of video from a Lord & Taylor department store near the site of the second blast, and that video from a Boston TV station also helped. King cited a source who was briefed on the investigation.
[Updated at 2 p.m. ET] The arrest is based on two videos showing images of the suspect, a federal law enforcement source told CNN contributor Fran Townsend.
[Updated at 1:46 p.m.] An arrest has been made in connection with Monday's Boston Marathon bombings, sources tell CNN's John King and CNN contributor Fran Townsend. King's source is with Boston law enforcement, he said; Townsend's source is with federal law enforcement.
[Updated at 1:44 p.m.] While we wait for more information about the possible suspect, some recent information to pass on about one of the three people who were killed in Monday's blasts: Boston University said Lingzi Lu, a graduate student in mathematics and statistics, was killed.
She and two friends were watching the race near the finish line when the blasts erupted, BU Today reported. The second student was in stable condition at Boston Medical Center; the third student was not hurt, it said.
The university said that it had the family's permission to identify Lingzi Lu.
[Posted at 1:40 p.m.] Authorities may have had a breakthrough in the investigation of Monday's Boston Marathon bombings. Investigators believe they have identified a suspect in the Boston Marathon bombings, a source who has been briefed on the investigation told CNN's John King exclusively.
The breakthrough came from analysis of video from a department store near the site of the second explosion. Video from a Boston television station also contributed to the progress, said the source, who declined to be more specific but called it a significant development.
Earlier, a federal law enforcement source with firsthand knowledge of the investigation told CNN that a lid to a pressure cooker thought to have been used in the bombings had been found on a roof of a building near the scene.
Well that's just Great, Wannabe reporters!
BAN CNN FOR BEING THE WORST – AGAIN!!! Vicious what you've done to Bostonians – and the country right now!!! Shameful of you!!!
second to that too...shame, shame, shame!
Are you really this stupid? Wow – blonde I'm guessing.
why on Earth would being first with misinformation be preferred? People make mistakes and remember the last time you miscommunication? Now imagine that hundreds of news outlets were calling you and different branches of the departments investigating. CNN is not perfect, but generally pretty good. I don't see them making stuff up here and we won't know if investigators put a lid on an arrest until later. Look at the wording and also understand that tuning here online or live on TV/radio is a choice. If you can do better.... Then go for it. Not as easy as it seems....
Please get that lady off of CNN! How many times can you interrupt someone in an hour! Horrible reporting CNN. I rather have a correct news story 30 minutes late, then an incorrect story early. Get it together CNN.
Joke station = Joke news reporting
Why are you still tuning in then? Guess you can do better? And WHO DOESN'T CARE ABOUT THEIR JOB? Wow....
.. turns out it was Thatcher!... fancy that..
CNN please, please stop this perpetual ratings race!! Do you not realize that YOU are part of the FEAR mongering in your country? Do you not recognize that meaningful FACTS from NAMED sources presented calmly & in context is the only way to convey news. More & more you confirm to the public that you are less & less credible, and that your tactics are highly questionable. Your conduct shames you in the eyes of the world – the Boston bombings do not merit you propagating rumours like an arc in a bad reality tv series. This saddens me tremendously
Anderson, your crossed arms say it all... might be time to work as an independent. There is always the BBC & CBC.
This saddens me.
Please stop the West something Baptist church from protesting the Boston Marathon funerals!!!! On face book they advised they will protest!!! I advised to leave them alone!!! Each state now needs to pass a law that it is against the law to protest any funerals in their state!!!! They are the church of the devil.....Please contact all senator and governors!!!
That's what we need another law. How about common sense trumps cover your ... because someone will sue you.
Fran Townsend blew it. She was wrong. Didn't multiple sourcing her reporting. Especially egregious for a supposedly qualified intelligence and counter-terrorism official (former). She was the first to report the arrest. She should be relieved of her duties by CNN. Perhaps so should John King.
You, bozo, should be relieved of your job as a sanitary engineer.
Let reporters do their job, and you just keep picking up the trash. David, if you had attended High School you wouldn't be in such a bad position.
I cannot stand idiot Americans (rather redundant) who have nothing to do but criticize others.
Sly.....isn't that what you are doing....
.. anyway, good that the FBI is investigating... cos they know all about terrorism..
Typical for CNN, guess I should have looked at the National Inquirer's website to get some real news, this news agency is the biggest joke. Where is the immediate resignation from this idiot John King?
Oops
I used to turn on CNN for the news but your reporting has become so bad it's like turning on FOX news. Why don't we all just wait until the officials hold a news conference to tell the public what's going on? We all need to stick to our local media where they wait to report facts. Bye bye CNN. You guys are horrible.
The reporter has ties to these officials. She got it right.... Investigators screwed up. If you don't like what you see here..... Then tune out. If you can do better.... Then shut up and suit up... Do it yourself.
Which is faster...CNN's breathless rush to be first with breaking news or their backpedaling on misinformation. For the last hour you could hear the rising "drama" in the voice of your correspondents...words tumbling out, increased tension in pitch, reporters interrupting each other to get their piece of info on air...all leading to a climax of "we've got him"..."an arrest has been made!" And now, of course, we learn the opposite!
Please stop operating like a day-time soap opera. I want news, not reckless speculation!
I wonder if the u s people feel the same pain that syrians do , since thousands of civilians in syria killed. By made in the usa weapons