BERGEN COUNTY - A string of alleged luring incidents have left Bergen County parents and children on edge.

The two most recent incidents happened Wednesday in Leonia. Police say a man in a car asked two girls for directions, then made an inappropriate sexual comment to them. 

Police in Ridgefield Park have released a sketch of a man they say was one of two men in a blue SUV that approached a child on a bike Monday. Capt. Daniel Hippe says the men tried to convince that child to approach the car.

Parents are being asked to talk to their kids about the danger. "It's sad nowadays you can't let your kids play," says Arelene O'Connor, of Ridgefield Park. "The sun is good for them, but I guess you have to be with them 24/7."

Police do not think the Ridgefield Park incident is connected to a similar one in Norwood.  Two students were walking behind the elementary school just after school let out when a man in a silver Jeep Wrangler motioned for them to come over.  They ran back inside the school and the man drove away.

Officers are reminding kids to walk in groups to and from school.  If approached by a stranger, they should yell "no" and run in the opposite direction.