U.S. immigration officials have barred a Syrian cinematographer who worked on an Oscar-nominated film from entering the U.S. ahead of Sunday's Academy Awards, the Associated Press reported early Saturday.

The Department of Homeland Security reportedly blocked Khaled Khateeb from traveling to Los Angeles for the Academy Awards. He was scheduled to arrive Saturday, but his plans have changed after U.S. officials reportedly found "derogatory information" regarding Khateeb.

Derogatory information is a categorization that includes a range of issues from terror connections to simple passport irregularities.

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Khateeb worked on a 40-minute Netflix documentary "The White Helmets" which covers the Syrian civil war and is nominated for Best Documentary Short. It includes dramatic scenes of the 6-year conflict, such as people digging through their destroyed homes looking for survivors.

Khateeb had reportedly been issued a visa to attend the Oscars, but Turkish authorities detained him this week, according to the internal U.S. government correspondence, and he needed a passport waiver from the U.S. to enter the country.

According to the Associated Press, he would not get such a waiver, and no explanation was provided for why Khateeb was detained.