Notify authorities immediately. On the Boston campus, call NUPD at 617.373.3333. At all other locations, call 911.
Don’t touch or pick up any suspicious object. If you’ve already opened a suspicious letter or package, remain calm. Don’t move it or examine it further. Limit the use of two-way radios and cellphone communications near the suspicious item. Keep others out of the area, and close off the area if possible.
If the package is leaking a substance or powder and you came into contact with the substance, keep your hands away from your eyes, nose, mouth, and any part of your face. Do not touch others or let others touch you. Wash your hands and arms from the elbow down with soap and hot water. Do not attempt to clean or cover anything that might have spilled from a package.