Facebook's California headquarters cleared after after threat
{{#rendered}} {{/rendered}}The Facebook campus in Menlo Park, Calif. Police flooded Facebook's headquarters Tuesday March 11, 2014 in Northern California to investigate a threat they later found wasn't credible. (AP Photo/Jeff Chiu)
Police flooded Facebook's headquarters in Northern California to investigate a threat they later found wasn't credible.
Menlo Park police Commander Dave Bertini says Facebook's campus was locked down Tuesday night after San Francisco police passed along a report of a threat shortly after 7 p.m.
Bertini says the threat was found to be unsubstantiated and not credible. He would not give further details.
{{#rendered}} {{/rendered}}The area was declared safe, and employees were allowed to leave at about 8:30 p.m.
More than 6,000 people work for the social media giant, but it wasn't clear how many were at the headquarters at that hour.