KANSAS CITY, Mo. (AP) — The American Civil Liberties Union urged a southwest Kansas school district Friday to call off plans for a pro-creationism group to talk to students about dinosaurs.

The Kansas and Western Missouri chapter of the ACLU and the organization’s Program on Freedom of Religion and Belief raised concerns in an email that the assemblies will be used to “spread creationism” in the 1,100-student Hugoton district. Superintendent Mark Crawford said he isn’t canceling the assemblies.