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-- Bill -- in tonight for Shepard Smith we are live on -- -- in the back -- of Boston.
Just a few blocks in the scene of Monday's bombing and what has been a somewhat chaotic day here.
And just minutes ago a federal source telling Fox News investigators are looking for two persons of interest.
A connection -- Monday's attack now both men captured in photos from the scene of more on that in a moment.
Of course hours ago we heard reports that an arrest was imminent need -- some talk that an -- that already happened.
The FBI later saying there were no arrests and has not been one nobody to bring to court here in Boston.
But at this hour we're still awaiting a news conference and investigators that has been rescheduled over and over again.
Shows home was there were overheard late tonight Rick Leventhal monitoring developments all day he's live in Boston with me as well.
Rick you broke the news of these two persons of interest.
What more can you report.
Well obviously bill the focus here -- to be on -- capturing that person or persons responsible.
For this horrific attack on the Boston Marathon that killed three and wounded nearly a 180 others.
We have seen the photographs of two men who.
Federal authorities are looking for as persons of interest possible suspects.
In those twin bombings on Monday we're not sharing those photographs -- our viewers yet because the FBI is not sharing those photographs with the public.
We don't want to jeopardize its investigation but.
I've seen these pictures they're very clear.
There are two men.
One appears to be carrying a backpack the other appears to have a bag these bags match the description that the federal federal authorities have told us are.
Believed to be back to carry the two bombs on Monday but again we're not showing these photos until the federal authority.
Ask the media that share these pictures because we want to make sure that we don't jeopardize any investigation and that the FBI does have a lead -- -- after these men.
That they have every chance to catch him and I think bill.
That one of the reasons why all of those reports surfaced earlier today.
Day about possible suspects either being -- -- -- -- being in custody is because these photos began circulating among law enforcement and there was confusion.
About whether or not there have been arrests but about the fact that there have been suspect or person of interest to about that I get up five or at least isolated by long.
And so you have seen the photos -- and based on the images you saw.
How clear -- the faces on these photos.
They're pretty clear.
There are multiple angles and you could definitely see their faces and and I hope and I believe that law enforcement.
Using those photos can positively identify the men on and whether or not they're the man who were actually responsible remains to be -- And I quickly Rick we've also learned earlier today -- investigators found more.
Possible parts from the bomb what's different today than from last night on that.
Well you'll we know that he's glad -- technicians have been on -- -- -- -- street for days now collecting evidence including.
Apparently the lid from a pressure cooker that blew up onto one of the roofs.
-- long -- and street after the blast we are told by federal authorities that a pressure cooker was believed to have been used in at least one of the two bombs and it was packed with.
Nails and ball bearings and we've seen the photos of those nails and ball -- we've also seen a photo of the black backpack that was shredded after that bomb went off.
We also know that federal authorities are carefully scanning.
That hundreds if not thousands of images still pictures and video from the scene again trying to link up.
The men were believed to be responsible with images from -- -- -- bill.
-- thank you -- good work today Rick Leventhal throughout tonight he'll be with us here in Boston.
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