Urbandale police are investigating a report by an 11-year old girl thatshe was sexually assaulted at the Urbandale High School. Urbandale policeLieutenant Robert Cox says the girl was attending a recreation program whenthe alleged assault took place Monday.Cox says the girl described her attacker as a white man in his mid 40’s.Cox says the assault has raised concern in the Des Moines suburb. Policehave received several calls with possible information on the assault.