Security threat interrupts White House press briefing from Medill Washington on Vimeo.

The evacuation came in the middle of a televised press briefing by Press Secretary Josh Earnest. The North Lawn of the White House was also cleared.

PHOTOS, STORIFY: Bomb threat sparks evacuation of White House press briefing 

Secret Service officials said the threat was called in at 1:53 p.m. About 30 minutes after the call journalists were allowed back into the White House. Secret Service officers on the scene said an all-clear had been issued.

“As a precaution, the White House Briefing Room was evacuated,” Secret Service spokeswoman Nicole B. Mainor said in a statement. “The evacuation was limited to the White House Press Briefing Room and did not affect any other sections of the White House.”

Shortly after the evacuation Earnest wrote on Twitter that the briefing would resume shortly after the room was cleared. “Hopefully won’t be long,” he wrote.

“At approximately 1:53 p.m. today, a telephonic bomb threat concerning the White House Briefing Room was called into the Metropolitan Police Department,” a Secret Service statement said. “As a precaution, the White House Press Briefing Room was evacuated.”

According to the statement, no other parts of the White House were affected by the evacuation.

“Sweeps concluded at 2:36, the area was declared safe, all occupants were returned to the White House Press Briefing Room,” the statement continued.

You can view photos from the scene below:

Here is a moment-by-moment rundown of the evacuation, as narrated by reporters who were attending the briefing when the evacuation occurred via social media: