(Midwest City-AP) -- Midwest City police are searching for a woman they say used three children to help her rob an elementary school.

Police Chief Brandon Clabes says the crime was caught on videotape by surveillance cameras at Traub Elementary school.

Clabes says the woman apparently used the children to reduce suspicion and that the children acted as a look-out for the woman.

Clabes says the tape shows the woman taking a teacher's purse from an unoccupied classroom. He says the woman is black and appears to be an adult.