One person was taken to the hospital Tuesday evening after a package delivered to a building at Northeastern University exploded when it was opened, school officials confirmed. A second package was also found and rendered safe by the bomb squad, Boston police confirmed at a news conference Tuesday night. Northeastern University said the package was delivered to Holmes Hall on Leon Street around 7 p.m. and detonated when a staff member opened it. That person, a 45-year-old man, suffered minor hand injuries and was taken to the hospital.