Whitby High School has issued a warning to parents and carers, after a man asked two of its students to get in his white van to help him find addresses on Tuesday (February 9).
The pair were approached as they walked along Heathfield Road near William Stockton Primary School at around 3.45pm, but refused to join him and walked away.
The van stopped a couple of times further up the road as the driver continued to engage them in conversation, before driving off.
Staff at the secondary school ask that students are reminded to keep a safe distance from strangers' vehicles, even if they are requesting help.
Ongoing police enquiries
Cheshire police confirmed it is investigating a report of suspicious activity and that enquiries are ongoing to establish the circumstances surrounding the incident.
A force spokesman said: “The students had the presence of mind to ignore the man and report the incident immediately.
“At no stage were attempts made to grab or physically coerce the girls, but police treat all incidents of this type extremely seriously and as a result you may see an increased police presence in the area as a precautionary measure and to provide reassurance to both pupils and parents.”
Anyone who sees any suspicious activity should contact police on 101.