UPDATE
Roads around the building have also been closed, according to NBC reporter Peter Alexander.
Some members of the White House Press Corps appear to have been locked inside the press room as the Secret Service investigate.
The Secret Service later said it had established a security perimeter and that members of the public and the media were being moved to a safe distance.
It was also reported that snipers could now be observed roaming the property and the North Lawn has been cleared.
The lockdown was instigated just hours before the morning press briefing with Sean Spicer.
Their is currently no word on President Trump’s whereabouts but The Donald was expected to sign an executive order that will suspend, rescind or flag for review more than a half-dozen measures introduced by the Obama administration to combat climate change.
More to follow…
Parts of the White House have been placed on lockdown after a “suspicious package” was discovered, a Secret Service Uniformed Division officer confirmed.1
The Secret Service have now started to evacuate the North Lawn.
Images posted to social media showed a Secret Agent locking the press inside the briefing room.
One Secret Service agent told a member of the press; ‘Nobody leave the press room.’