BUDAPEST, Hungary (AP) — Central European University says it will move its U.S.-accredited programs from Hungary's capital of Budapest to the Austrian capital of Vienna because of uncertainty over its academic freedom.

The university founded in 1991 by Hungarian-American billionaire and philanthropist George Soros says it has complied with all new requirements for it to remain in Budapest, but has been kept in "legal limbo" by Prime Minister Viktor Orban's government, which has refused to sign an agreement needed for CEU to remain in Hungary.

The fiercely anti-immigrant Orban is against Soros and his "Open Society" democratic ideals.

Earlier this week, a bomb was found in a mailbox at Soros' suburban New York home. The pro-democracy philanthropist has been criticized by U.S. President Donald Trump and vilified by right-wing conspiracy theorists.