Officials do not believe the attempted abductions are related because victims' descriptions differ, but say one Skokie incident may be connected to a similar incident in Winnetka.
North Shore residents are on edge.
"It makes me nervous. Fortunately, my kids are picked up by a school bus, so I don't really have to worry about that walking to school and stuff like that," said Heather Case, parent.
On Tuesday morning, a 15-year-old girl was approached by a male on foot in the 9100 block of Skokie Boulevard in Skokie.
"He attempted to engage her in conversation, attempted to grab her by the arm, at which time she pulled away and boarded a bus that was nearby and escaped," said Michael Krupnik, Skokie Police Department.
In all, four incidents have been reported on the North Shore this month:
"Our investigators are probably looking at all information whether it be within the village or neighboring sub suburbs to make sure we get as much information as we can," said Krupnik.
North Shore schools are alerting parents.
"We have been sending letters home to have the stranger danger talk with their children, as we have been having the talk here at school," said Supt. Jim Schopp, Skokie School District 73.
Officials said that in each of the situations, the child was able to get away and reported the incident.
"If they weren't smart enough, they would have got in the car and they wouldn't come back," said Spencer Case, student.