Roosevelt High School is urging its students to stay alert.
An e-mail went out to parents Wednesday telling them a female student reported being approached on 45th Street by a man in a black SUV. He called out to the girl, telling her she was pretty and asking how old she was. The man offered the girl a ride home. She declined and got home safely.
Merrill Middle School is also urging its student to remain cautious.
Students are also being encouraged to walk in groups of two or three and more adults are on patrol outdoors.