The U.S. Secret Service is planning to boost its presence and its surveillance measures around the White House on Monday after an Iraq war veteran, who is apparently suffering from PTSD, jumped over a White House fence.
Officers patrolling the area will be out in greater numbers and will be "looking for individuals who don't look like tourists," a federal law enforcement officer told CNN.
Two security incidents in two days have raised concerns about the safety at 1600 Pennsylvania Ave.
On Friday, Omar Gonzalez hopped the north fence and sprinted just past the north portico White House doors when he was stopped, Secret Service spokesman Brian Leary said.
Gonzalez carried a Spyderco VG-10 folding knife with a 3-and-a-half inch serrated blade in his pants pocket, according to an affidavit.
A Secret Service officer said he yelled at the intruder to stop. Gonzalez told a Secret Service agent "that he was concerned that the atmosphere was collapsing and needed to get the information to the President of the United States so that he could get the word out to the people," according to the affidavit.
President Barack Obama and his family were not at home at the time.
See more on this developing story on CNN.com