Marine Corps Base Quantico in Prince William County, Virginia, has been placed under Code Red. All personnel were advised to shelter in place.

According to the official Marine Corps Base Quantico Twitter account, “All MCBQ personnel are advised to shelter in place for Law Enforcement activity. All inbound and outbound traffic is stopped. Only mission essential personnel are expected to report to work.” the order was issued around 1:20 p.m. due to an unknown situation being investigated in the vicinity of Lyman Park.

Also Read | Who is Major General Matthew ‘Matt’ Holmes? Former Royal Marines head died by suicide facing ‘substantial stress’

It is not clear what has caused the Marine Corps Base to go on red alert. Although the base had tweeted that the Code Red was over after a while, they were quick to correct that message and told people to disregard the error.

“ALL personnel on main side Quantico are to shelter in place until further notice. Disregard any previous message sent in error. Repeat shelter in place until further notice,” read a follow-up tweet.

Also Read | All about Kiska, ‘world’s loneliest orca whale’, star of Free Willy movie dies at at Marineland theme park, Niagara Falls

This is a developing story.