Apple Park was briefly evacuated Tuesday when a dangerous-seeming mail item was discovered by an employee.

Employees were allowed to reenter their offices though when the substance was deemed not to be harmful.

NBC cited Santa Clara County Fire Department Capt.

Justin Stockman as saying the envelope contained a “white powder substance.”

Apple and the local county fire department didn’t immediately respond to requests for comment.

Earlier today,#sccfdresponded to a hazardous materials incident at@Appleheadquarters.

An employee identified a suspicious mail item.