Sioux Falls Police are keeping a close eye on elementary schools after another report of a suspicious man trying to lure kids into his vehicle. This is the third similar incident within a week; all have been near elementary schools. Police are asking parents to have the stranger danger talk with their kids. The description of the latest man is a white male 50-60 years old with gray hair. This time he was in a white SUV. The other two incidents the man was driving a black car one time and a white vehicle the second time.