A Muslim man, who is also a U.S. Army reservist, filed a lawsuit Wednesday against the owners of an Oklahoma gun range after they allegedly told him to leave when he identified himself as a Muslim.

Raja’ee Fatihah’s lawsuit was filed in U.S. District Court in Muskogee against the owners of Save Yourself Survival and Tactical Gun Range in the town of Oktaha.

A sign posted on the business declared the range a “Muslim-free” establishment, and is similar to signs that have been placed at businesses in Florida, Arkansas, Kentucky and New York, said Brady Henderson, legal director for the Oklahoma chapter of the American Civil Liberties Union, which filed the suit.

“Whether the sign in question says ‘no Muslims’ or whether it says ‘no coloreds’ or whether it says ‘no women’ or ‘no Christians’ or ‘no Buddhists’ … it is just as un-American and fundamentally it is just as wrong,” Henderson said.