Authorities say an armed carjacking in West Philadelphia ended in an exchange of gunfire at the University of Pennsylvania and the death of a suspect.

No one else was injured in the exchange behind the university library about 3 a.m. Sunday.

University Vice President Maureen Rush said the early morning hour and the cold weather had kept people off the streets.

University security officials said the vehicle was carjacked about a mile from the school. Philadelphia police gave chase; the driver lost control, crashed into a concrete barrier near campus, and two male suspects fled.

Officials said police ran after them, and one suspect was shot. He was pronounced dead at the Hospital of the University of Pennsylvania. Police arrested the other man.