CHARLOTTE, N.C. (WBTV) - The FBI is among the federal agencies looking into the deadly Aug. 22 knife attack on a Charlotte light rail, director Kash Patel confirmed Monday night.

In a Sept. 8 social media , Patel said the FBI had been investigating the case “from day one.” In the same post, he also told the public to “stay tuned.”

Patel’s confirmation came at almost exactly the same time that Transportation Secretary Sean Duffy said that his U.S. Department of Transportation would also be investigating the case.

During the fatal Aug. 22 incident, graphic a 23-year-old Ukrainian refugee -- Iryna Zarutska -- get onto a Charlotte light rail train and sit down in front of her would-be attacker, 34-year-old Decarlos Brown Jr.

Just moments after Zarutska sat down, the video showed Brown

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