Georgia Southern University public safety officials, along with federal, state and local emergency management agencies, are investigating a "mysterious white powder" found in an envelope sent to the university's admissions building. HazMat and emergency response crews were at Lewis Hall, an administrative building that houses the university's office of admissions, throughout the day Wednesday, to test and remove the unknown substance. "This morning at about 9 a.m. we were alerted that a package was received at Lewis Hall containing a suspicious white powder," said Mike Russell, Director of Public Safety at GSU. "We immediately responded, quarantined the building, notified HazMat, fire and EMS." Crews began to stage the scene shortly after arrival, and entered the building to evaluate the situation.