Students warned about weekend robberies near University of Chicago

The University of Chicago is warning students about two robberies Sunday night near the campus where students were robbed at gunpoint of their cell phones and a laptop computer.
The first robbery occurred as two students walked along 57th Street near Dorchester Avenue at about 11:35 p.m.
They were approached from behind by a black man holding a revolver. The robber took the students' cell phones and fled north on Dorchester Avenue.
About 30 minutes later, another student was approached from behind by a group of three black males while sitting in the main quadrangle near 57th Street and Ellis Avenue, police said. One of the males pulled out a gun and the group took the students' cell phone, a laptop computer and book bag.
The robbers fled west toward South Ellis Avenue.