A package detonated at Northeastern University in Boston on Tuesday night, and a staff member sustained a minor hand injury, according to the school and police.
The package was sent to Holmes Hall on Leon Street, where police responded at 7:18 p.m., authorities said. Boston Police Superintendent Felipe Colon said there was a second similar package that was rendered safe by the bomb squad.
Law enforcement's preliminary assessment is that the minor explosion on campus was not random, two sources briefed told ABC News.
Boston EMS had responded to the explosion at the university, with the 45-year-old victim transported to an area hospital with non-life-threatening injuries, according to police and officials.
The Northeastern University staff member who sustained injuries Tuesday evening in what authorities called a "package detonation" had opened a hard-backed pelican-type case, law enforcement sources told ABC News.
Authorities also found what the sources described as an anonymous note railing against virtual reality, among other things.
abcnews.go.com