Sarin, a toxic chemical weapon found at Facebook Inc

Sarin, a potentially toxic compound that disrupts the nervous system has been used as a chemical weapon and the exposure can be fatal.

The package has been discovered at Facebook Inc after the social media company’s Silicon Valley mail facility tested positive for the toxic compound.

The incident took place on 2^nd Tuesday at around 11 a.m. says Jon Johnson, fire marshall for the city of Menlo Park, where Facebook is based.

The spokesperson of the company Anthony Harrison told News18 that the company have successfully evacuated four building following the positive test and was cooperating with police in the investigation. “ Authorities have not yet identified the substance found. As of now, three of the evacuated buildings have been cleared for repopulation,” Harrison said.

“The (Facebook) facility test all of the packages that come in and they had a positive test, so they just initiated their standard protocol. Now we’re just waiting to verify whether that’s true or not,” says Jon Johnson.