The superintendent of Ames schools says the district is keeping a close eye out for the kind of threatening text messages that spurred the closure of schools in Iowa and Nebraska. Tim Taylor says the West Des Moines, Ankeny, and Johnston school districts, where annonymous threatening text messages were recieved, use the same kind of "Infinite Campus" student data base. Taylor urges anyone who gets a threatening message to call the Ames Police Department. Messages of unknown origin prompted administrators to close schools in Johnston on Tuesday, and in Algona and Plattsmouth, Nebraska on Wednesday.