University staff member treated after package explodes on Boston campus

A staff member at Northeastern University in Boston was treated for a minor injury after a package exploded when it was opened on campus.

The Pelican case that exploded on Tuesday evening contained a note criticizing Facebook founder Mark Zuckerberg, sources told NBC 10. The outlet also reported that the incident involved an "over-pressurized case," not an explosive device.

A police bomb squad responded to a second suspicious package and "rendered it safe," local NBC 10 reported. The two incidents appear to be unrelated according to initial reports.

The school said its Boston campus is "is secure and open" and that a "staff member was treated at a local hospital for a minor hand injury after handling a hard plastic case."