KAPOLEI, Hawaii - There's a new warning for parents from Kapolei High School.

A letter was sent home to parents Thursday, saying several students were approached by a man near Kaiau Avenue while walking home from school Monday afternoon. 

The man talked to the students then became aggravated when they tried to leave. They were able to leave safely. 

The next day, a student saw the same man in the same area gesturing at them.

Honolulu Police are now investigating.