Valparaiso Police are investigating a suspicious incident that occurred outside Montessori School (daycare center) at 505 Marquette St. On Tuesday afternoon police were called to the location after a male subject approached a grandparent of a child and inquired about the procedures for picking up a child at the center. The subject drove off a short time later without picking up any students. The male subject was driving a blue minivan with possible Texas license plates. The male subject was described as approximately 70 years old. He had gray hair and was wearing glasses with a baseball cap. Police are investigating the incident and have increased patrols in the area.