Sachem Central School District officials are reminding parents and guardians to educate students on “stranger danger” after an incident at a bus stop for the high school prompted extra security patrols and a districtwide warning.

According to district officials, a man — who appeared to have emerged from a light-colored van without side windows — approached a female student at the bus stop off Grundy Avenue.

The man, whom the student did not know, began asking her personal questions about her age and where she lived. The man fled after seeing the student’s grandmother. There appeared to be another man in the van, according to the report.

“Parents and families should use this as an opportunity to talk about stranger danger,” Superintendent Kenneth Graham said Wednesday morning.

The student’s family reported the confrontation to the district, which alerted Suffolk County police. The district has added extra security patrols this week after the incident, which occurred on Tuesday morning.

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Officials also posted on the district website a letter from Graham about the incident.

“I commend our students for being cautious, and for notifying us immediately,” said Graham, who started as Sachem’s new superintendent in July.

Sachem is Long Island’s second-largest school district.

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Parents are advised to have a plan for their children in such situations on how to respond, where to go and whom to call.

If possible, students should walk to and from the bus stops and school with a buddy or group, school officials said.