Person in Custody After Driving Up to White House Checkpoint Claiming to Have a Bomb

Update via RedState:

Here is the scene on 17th St. Firetrucks and hazardous materials units on standby near the White House. pic.twitter.com/XU8Fdo864B
— Ryan Nobles (@ryanobles) March 19, 2017

The Secret Service released a statement:

On March 18, 2017 at approximately 11:05 pm, an individual drove a vehicle up to a Secret Service checkpoint located at 15th Street and E Street NW. Upon contact with the individual, U.S. Secret Service Uniform Division Officers detained the individual and declared his vehicle suspicious.
In accordance with proper protocols, Secret Service personnel increased their posture of readiness.
Due to the fact that this is an on-going criminal investigation, the Secret Service will not provide any further details at this time.

From CNN:

A car drove up to a White House checkpoint late Saturday night and the driver claimed to have a bomb in his vehicle, two law enforcement officials tell CNN.
There was no confirmation that there was any device in the vehicle but security at the White House was immediately upgraded.
One person was in custody after the incident and the vehicle was being checked, the sources said.
Several streets around the White House were closed in what remained an ongoing situation.

This story will be updated as more details become available.