ANKARA, Turkey (AP) — Islamic State militants have called Turkish President Recep Tayyip Erdogan a traitor for allowing the U.S. to use air bases for strikes against the group, and urged Muslims in Turkey to support the extremist group and fight the "crusaders, atheists and tyrants."

An IS video message released on Twitter on Monday shows a Turkish-speaking fighter, flanked by two others, accusing Erdogan of permitting the U.S. to "bombard the people of Islam."

Six F-16 fighter jets arrived at a Turkish air base last week and began flying missions against the IS group over Syria.

The Associated Press couldn't independently verify the footage, but it was shared widely by IS supporter on social media and resembled other propaganda distributed by the extremists.