Police are hunting for a man driving a white van in Surrey after he was spotted trying to "grab" schoolchildren from the street.
Similar incidents were reported by two separate schools in Woking as school race to warn youngsters and their families.
Parents are being warned to make sure their children are aware of the dangers and headteachers have sent letters home alerting families of the two reported incidents and asking them to report anything suspicious.
A letter sent by Woking High School headteacher Maiken Walter read: “We have been informed by the police that a student from Woking High School has reported that an adult male in a white van tried to grab him this afternoon on his way home.
“The police are investigating the incident and they have advised that children, parents and carers walking to and from school in Horsell are extra vigilant over the coming days.
"Please get in contact with the police if you notice anything suspicious.”
A similar incident was reported close to Bishop David Brown School, also in Woking, earlier this week.
A letter sent out yesterday, read: "I am writing to make you aware of an incident which occurred yesterday evening after school near Walton Road, Maybury.
"Two of our students were approached by a man in a white van.
"The police are investigating the incident, we advise that any children, parents or carers walking to and from school are vigilant. If you notice anything suspicious please report this directly to the police.”
Police are yet to confirm if the two incidents are connected.
Surrey Police's borough commander for Woking, Nell Rodriguez said: “I know that parents will be rightly worried about this incident and I would like to reassure them that we are doing everything we can to investigate and understand what has happened."