A man driving a small black four-door car and wearing a mask approached three Wilson Middle School students as they walked to school Monday morning, according to a letter emailed to parents.

The incident happened between 6:30 and 6:45 a.m. near the Indian Village Apartments on Goddard, between Fort and 15th streets in Lincoln Park, according to the letter from Principal Jason Krajewski.

"The man asked the students to come over to him, to which they replied 'no,'" the letter said. "The students ran the rest of the way to school. ... When the students arrived at school and reported the incident, the police were called."

Krajewski urges parents to use this incident to stress the importance of stranger danger.

"Please take time to speak with your child about not approaching or talking to strangers," the letter said. "Also, make sure they understand the importance of reporting such incidents to you. A reminder, the doors at Wilson Middle School do not open until 7:30 a.m."

Wyandotte Police Chief Daniel Grant said the case remains under investigation.