The White House, which always looks deceptively exposed when peering at it through fencing, had an errant bullet stopped by ballistic glass, officials told the Associated Press. And the Secret Service, according to ABC News, is investigating whether it is connected to reports last Friday that a 21 year-old who may have brandished a semi-automatic weapon fired shots in the vicinity. The suspect, Oscar Ramiro Ortega, was described by ABC News as "mentally-ill" and is suggested to have a "fixation on the White House"--which doesn't look like a good combination--and appears to be the person that the Service is looking at, according to the news outlet.

The Secret Service now suspects that a bullet fired in this incident may have hit the White House after a bullet round was found in a White House window, though the round had not yet been conclusively linked to the incident.  The round was stopped by ballistic glass behind the historic exterior glass, while an additional round has been found on the exterior of the White House.

Ortega is still apparently at large even though a warrant for his arrest had been issued Friday night, CNN notes. On Monday, Park Police Sgt. David Schlosser told The Washington Post that police didn't know what Ortega was suspected of firing at, nor did they know if he had any motivation.