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12:22 PM PT -- The U.S. Attorney's Office says it's not moving forward with charges at this time, but the investigation is continuing.

11:21 AM PT -- We just got this video of Kodak before his show in D.C. and he's grabbing some seafood down the street from the concert venue ... and the sighting is from around the same time the tour bus raid was starting.

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7:00 AM PT -- According to cops, they confiscated 4 Glock handguns with magazines. Five people were arrested -- none of them Kodak -- and all were booked for carrying a pistol without a license and possession of large capacity magazines.

Police emphasized they can't confirm the raided bus was Kodak's ... only that it was connected to the show.

4/25 -- A rep for Kodak tells TMZ, "Kodak was 100% not arrested, he is en route to NYC for his sold out show tomorrow night at United Palace."

A tour bus parked outside Kodak Black's Washington D.C. concert just got raided by the FBI and local police while the rapper was inside the venue performing.

You can see in the photos -- obtained by TMZ -- several FBI agents standing outside the bus ... we're told those who were inside the bus were placed in handcuffs and brought outside the vehicle. It's currently unclear if the bus was Kodak's, belonged to crew or other members of the tour.

The agents searched the luggage underneath the bus, everything inside, and the area surrounding the bus is completely roped off.

Sources on scene tell us the feds attempted to enter the venue -- The Anthem -- where Kodak was performing, but promoters did not allow them inside.

It's another possible black eye for Kodak's tour ... as we first told you, Kodak was arrested just last week on weapons and gun charges at the Canada-U.S. border on his way from Detroit to Boston between shows. Cops say they found weed and a gun in the car he was driving.

We reached out to the FBI and local authorities ... so far, no word back.