An internal statement issued by the Secret Service and later shared on social media by NBC News' Kelly O'Donnell indicates that at "approximately 12:55 p.m. near 17th and F Streets NW, US Secret Service Uniformed Division Officers arrested one individual for Crossing a Police Line and Assault on a Police Officer after they attempted to impede the progress of a vehicular traffic in a temporarily secured area."
"The individual will be transported to MPD 2D for processing," the statement adds.
Citing sources, O'Donnell reported that it was a Chinese delegation's motorcade involved in the accident.
Earlier reports claimed that the motorcade was that of US President Donald Trump, and that a pedestrian, who was believed to be a protester, and a Secret Service agent were injured after the unidentified pedestrian jumped in front of the motorcade near the 17th and Pennsylvania Ave. intersection in northwest Washington, DC.