DEVELOPING: White House is on lockdown; no reason is given, but reporters have been told to leave the North Lawn https://t.co/3NwhNbWGtu pic.twitter.com/IEoN9f34NP
— CBS News (@CBSNews) November 3, 2017
JUST IN: U.S. Secret Service says White House is on lockdown "due to suspicious activity" and a suspect is in custody, @kwelkernbc reports
— NBC News (@NBCNews) November 3, 2017