Some flights intended for refugees approved to enter the United States are reportedly being canceled.

The International Organization for Migration (IOM), which is responsible for finding travel for refugees, sent cancellation notices Monday for flights in October, CNN reported.

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The notices, obtained by CNN, cited "FY20 moratorium extension" as the reason for cancellation but did not include an end date.

Resettlement agencies had been preparing for the refugees, some of whom could be left in limbo as their medical exams and security checks reach their expiration dates.

CNN reported that arrival moratoriums occur every year and are not expected to extend beyond a week.

The Hill has reached out to the IOM and the State Department's Bureau of Population, Refugees and Migration for comment.

President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE's administration lowered the U.S. cap of permitted refugees to 30,000 last year. It is unknown what the cap will be this year, though reports circulated earlier this month suggesting the administration was considering a cap of zero.

Democrats have spoken out against the president's refugee reduction. The House Judiciary Committee sent the departments of State, Homeland Security and Health and Human Services a letter saying Congress is required to be consulted to establish next year's refugee cap.

"We are increasingly disturbed by the administration's disregard for legal requirements, congressional intent, and the importance of refugee resettlement to our nation," the letter read.