Authorities have issued a warrant for a 42-year-old North Philadelphia man in connection with a violent robbery inside a Drexel University building last week, police said today.

Police said Marvin Sutter, of the 300 block of East Erie Avenue, is the man seen in a surveillance video casing the university's Stratton Building at 3201 Chestnut St. before being confronted by a female 57-year-old science instructor about 6:15 p.m.

Sutter, police said, fled after the victim started to scream, leaving with her cell phone.

Police said Sutter is considered armed and dangerous. Anyone with information on his whereabouts should contact Southwest Detective Division at 215-686-3183 or the Philadelphia Police tip line at 215-686-TIPS (215-686-8477).