Late Saturday night, officers from the Secret Service Uniform Division detained a man who was driving a vehicle that appeared to be suspicious. According to a secret service spokesperson the incident happened at 11:05 p.m. near a Secret Service checkpoint near the White House at 15th and E Street NW.
Early on Sunday, a secret service spokesperson confirmed that an "on-going criminal investigation" is under way. Driving through the checkpoint does not give somebody direct access to the White House grounds even though the Secret Service kiosk is located at the southeastern corner of an outer perimeter that encloses the grounds of the White House. This is northwest of the Department of Commerce and south of the statue of General William T. Sherman, meaning a quarter mile away from the White House.
The agents considered the vehicle to be suspicious and immediately increased their posture of readiness. It is still not clear what determined the secret service officers to consider the motorist's vehicle as being suspicious, what actually happened next and what determined them to detain the man. This information was not released to the press until now.