Facebook evacuated four buildings as officials determined what caused its Silicon Valley mail facility to test positive for the nerve agent sarin.
No injuries have been reported at the site so far, with officials confirming that two people are being evaluated.
Authorities said the evacuation was ordered after a package tested positive during a standard check at the facebook facility. "Now we’re just waiting to verify whether that’s true or not," an official confirmed.
A Facebook spokesman said they were cooperating with police in the investigation, adding that "authorities have not yet identified the substance found".
Russia pounds Kyiv with missiles, killing at least nine
Trump says deal reached to disarm Hamas, Israeli support for plan remains uncertain
Kuwait intercepts new wave of Iranian attacks
India's Modi says punishing student protesters will not resolve situation
