Facebook facility evacuated after sarin scare

A mailing facility in Menlo Park, Calif., owned by Facebook was evacuated Monday after the nerve agent sarin was reportedly detected.

Facebook spokesman Anthony Harrison said the incident began in the morning when a package in the mail room was “deemed suspicious.”

“We evacuated four buildings and are conducting a thorough investigation in coordination with local authorities,” Harrison said. “Authorities have not yet identified the substance found. As of now, three of the evacuated buildings have been cleared for repopulation.”

A local ABC affiliate reported that the FBI and National Guard were called in to assist.

According to the outlet, fire officials said that everyone in the facility was safe, but two people were being examined for possible exposure.

It’s still unclear whether the substance was actually sarin. Fire officials told ABC News that a second test had come back negative.