Alicia A. Caldwell, AP, September 19, 2016

The U.S. government has mistakenly granted citizenship to at least 858 immigrants from countries of concern to national security or with high rates of immigration fraud who had pending deportation orders, according to an internal Homeland Security audit released Monday.

The Homeland Security Department’s inspector general found that the immigrants used different names or birthdates to apply for citizenship with U.S. Citizenship and Immigration Services and such discrepancies weren’t caught because their fingerprints were missing from government databases.

The report does not identify any of the immigrants by name, but Inspector General John Roth’s auditors said they were all from “special interest countries”–those that present a national security concern for the United States–or neighboring countries with high rates of immigration fraud. The report did not identify those countries.

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Roth’s report said fingerprints are missing from federal databases for as many as 315,000 immigrants with final deportation orders or who are fugitive criminals. Immigration and Customs Enforcement has not reviewed about 148,000 of those immigrants’ files to add fingerprints to the digital record.

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The government has known about the information gap and its impact on naturalization decisions since at least 2008 when a Customs and Border Protection official identified 206 immigrants who used a different name or other biographical information to gain citizenship or other immigration benefits, though few cases have been investigated.

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