White House goes on lockdown after notebook thrown over fence

The White House went into lockdown on Monday after a notebook and a sign were thrown over the fence along Pennsylvania Avenue.

The Secret Service said it has a man in custody.

“Incident cleared, male subject arrested & taken to @DCPoliceDept. Items thrown were a sign and a notebook. Both were deemed nonhazardous,” the Secret Service said. 

{mosads}NBC News’s Peter Alexander reported earlier that a yoga mat and a sign were the items tossed over the fence, but the Secret Service later clarified that the other object was a notebook. 

NEW: Secret Service agent with TV pool says the White House lockdown was caused by someone who threw a sign and yoga mat over the fence.

— Peter Alexander (@PeterAlexander) September 11, 2017

The incident occurred the same morning President Trump and first lady Melania Trump led a moment of silence on the White House South Lawn in memory of the Sept. 11 terrorist attacks.