NBC News's Peter Alexander on Monday reported that the White House lock down that morning was due to someone throwing a yoga mat and a sign over one of the property's fences.
The Secret Service on Monday said it had taken two people into custody for throwing “unknown objects” at the White House.
Uniformed Division responding to an incident at the north fence line, along Penn. Ave. Area is closed to pedestrian traffic.— U.S. Secret Service (@SecretService) September 11, 2017
Penn Ave. and Lafayette Park remain closed to pedestrians.— U.S. Secret Service (@SecretService) September 11, 2017
The agency did not clarify what manner of objects were thrown by White House grounds, or if President Trump or his family were at the residence when the incident occurred.
Trump earlier Monday commemorated the 9/11 terrorist attacks for the first time since he became president.
“On that day not only did the world change, we all changed,” he said of the bloodshed on Sept. 11, 2001. “Our eyes were opened to the depths of evil we faced.”
“But in that hour of darkness, we also came together with a renewed sense of purpose,” Trump added at the Pentagon in Arlington, Virginia. “Our differences never looked so small.”
Trump also warned terrorists against attacking the U.S., pledging that “America cannot be intimidated.”
“And those who will try will soon join the long list of enemies who dared test our mettle,” he said. “We are making plain to these savage killers that there is no dark corner beyond our reach.”
“America does not bend. We do not waver. And we will never, ever yield. Our values will prevail. And the memory of our loved ones will never, ever fail.”
Monday marked the 16th anniversary of the 9/11 attacks, a series of coordinated strikes that ultimately killed nearly 3,000 people.
Nineteen hijackers claiming allegiance to al Qaeda hijacked four commercial airplanes, crashing two into the Twin Towers in New York City.
A third jet struck the Pentagon, while a fourth went down near Shanksville, Pennsylvania after its passengers tried fighting back against the extremists.
Trump entered office last January and has since made eliminating terrorist organizations like the Islamic State in Iraq and Syria (ISIS) a major goal of his administration.