Malcolm Wiley, a spokesman for the Secret Service, said the man apparently shed his clothes at about 5 p.m. Wednesday and left them in a bag near an intersection while he jogged, The Washington Post reported Thursday.
"He wasn't yelling or protesting, just going for a jog," Wiley said. "He was apprehended, naked though he was."
Wiley said the bag was initially considered a suspicious package but investigators determined it contained only the man's clothing.
The man was taken into custody but was not charged Wednesday, Wiley said.