KANSAS CITY, Mo. (AP) — McDonald’s has started a transatlantic barbecue feud with the introduction of a Kansas City-themed hamburger in the U.K.

Outgoing Kansas City, Missouri, Mayor Sly James said Tuesday that the fast-food chain should “stay in your lane” in a tweet that included a picture of what he says a “real” burger looks like. Kansas City is known for its style of dry-rubbed, slow-cooked meats drizzled in tomato-molasses sauce.

He responded after McDonald’s proclaimed “Yeehaw” as it introduce d its “Kansas City Stack” in a tweet. Other twitter users rushed to join the mocking. Barbecue powerhouse Q39 kidded “Yeehaw, mate!” while Joe’s Kansas City Bar-B-Que re tweeted a scathing critique of the burger and added a laughing tears and thinking faces emoji.

The burger is available until June 25, but not in America.