Police are searching the area after an attempt was made to abduct two 12-year-old girls in Bourne.
They were approached by a man driving a white van in Harrington Street at about 8.30am today.
The driver tried to talk them into getting into his van before grabbing one of the girls by her clothes.
Both ran away and joined another group of pupils making their way to school.
The van driver is described as white, middle-aged with brown hair. Police believe the van may have been a Ford Transit.
Patrols in the area have been stepped up as a result of the incident.
Call 101 quoting incident 241 of March 5 if you saw anything.