A bullet hit a White House window early Tuesday morning, but was stopped by the building’s ballistic glass, according to the U.S. Secret Service.
The Secret Service said a second bullet was found on the White House grounds. No one was injured.
Authorities did not specify the type of bullet. The discovery came after reports by witnesses hearing gunfire near the White House on Friday.
President Barack Obama was not home at the time.
Investigators believe the bullets were not fired intentionally at the White House, but may have the been the byproduct of street crime in Washington.