A bomb threat prompted authorities on Tuesday to evacuate a building at the Silicon Valley headquarters of Facebook Inc (FB.O), police said, but gave the “all clear” after an hours-long search turned up no sign of a device.

The New York Police Department had received an anonymous tip about a bomb threat regarding Facebook’s campus in Menlo Park, California, and alerted local authorities at about 4:30 p.m., a spokeswoman for the Menlo Park police said.

Late on Tuesday, police said the building was secure, however.

“The San Mateo County bomb unit was dispatched with explosive detection dogs that conducted a sweep of the building and found no suspicious packages or devices,” they said.

“The building is all clear and secure.”

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https://www.gistporte.com.ng/police-sound-all-clear-after-bomb-threat-at-facebooks-silicon-valley-campus