Schools in Bourne reacted quickly to warn pupils following the attempted abduction of a boy of 11.
A man in a small black van attempted to force a Bourne Academy pupil into his vehicle between 8am and 8.30am on Tuesday and left the lad “very frightened”.
Police were called as soon as his school, Bourne Academy, became aware of the incident and officers were quickly on the scene.
Headteacher Laurence Reilly said: “We also contacted all other schools in Bourne to alert them to the situation.
“I then arranged for all our students to attend special assemblies during the afternoon where they were informed of the incident.
“We impressed on them the need to be extra vigilant when out and about and to report any further incidents and sightings of suspicious behaviour immediately to the police.
“The students were then given a letter to inform parents of the incident.”
Police are still appealing for witnesses and their investigations are continuing as they try to track down the man responsible.
Speaking after the incident, Det Insp Pete Grayson said: “This is a worrying turn of events and we need to identify the van driver as soon as we can. In the meantime I would urge parents to be aware of the whereabouts of their children and not to let them venture out alone.”
Police have reviewed CCTV footage, but still hope witnesses who saw the van – either moving or parked – will step forward to help.
The man is described as white, in his mid to late 40s, and 6ft tall.
He is of medium to heavy build, with dark brown hair that’s short and “spiky” and has a tattoo on his neck.
At the time of the abduction attempt, the man wore a dark jacket and dark clothing. Police want to speak to anyone who was in the North Road or Stanley Street area between 8am and 8.30am on Tuesday.
A police spokesman said: “It would have been quite busy on the roads in the area at that time and people may have noticed if a van was parked up.”
nAnyone with information about the man or his van is asked to call Lincolnshire Police on 101 – or Crimestoppers, anonymously, on 0800 555111.
Callers should quote incident 92 of December 2.