A bullet was found in a window of the White House by the U.S. Secret Service after it pierced through a window pane and was stopped by a second pane of bullet proof glass.
Authorities are trying to pin point when the bullet was fired and speculated if it might have been the result of an incident last Friday when shots were reportedly heard in the vicinity of the National Mall.
It is reported that a second bullet was found at the exterior of the White House, according to the Secret Service, who is investigating the shots.
The discovery has also enlisted the investigatory efforts of the FBI, the U.S. Park Police, the D.C. police, as well as the Bureau of Alcohol, Tobacco, Firearms and Explosives.
A possible lead in the shooting is an unoccupied vehicle, which held an AK-47 assault rifle, and found parked near the Theodore Roosevelt Bridge and Lincoln Memorial.
The discovery of the vehicle, and information stored within it, has resulted in the issuance of an arrest of Oscar Ortega-Hernandez.
Neither President Obama, who was in San Diego around the time, and First Lady Michelle Obama, were in the White House when the shots were reportedly heard, which was shortly after 9:00 p.m. on Friday.