According to NBC reports, on-site emergency personnel at Apple Park, Apple headquarters, found unknown objects and then evacuated some people from the park. Apple has yet to comment.
There, first responders found an envelope containing an unknown white substance, which was evacuated to avoid possible hazards, according to Santa Clara County Fire Department Chief Justin Stockman.
Now, emergency workers have determined the situation is under control and employees have been allowed to return to the campus. It is unclear what this substance might be. The official follow-up update stated that the substance was assessed and the building was not contaminated, so employees were allowed to return to the office, but the official did not provide details about what the substance was.