(JTA) — Anti-Israel ads are appearing on Denver-area buses while the Jewish National Fund holds its national conference in the city.

The ads, which include the slogan “Want peace? Stop ethnic cleansing in Palestine,” are sponsored by the website Notaxdollarstoisrael.com and the Colorado BDS Campaign, the Intermountain Jewish News reports.

The JNF’s national conference draws thousands of participants annually. This year’s four-day conference in Denver kicked off on Oct. 25

The Anti-Defamation League issued a statement calling the advertisements “inaccurate, inflammatory, and divisive,” though it acknowledged that they constituted protected speech under the First Amendment.