The Department of Homeland Security (DHS) cannot find 266 potentially dangerous foreign nationals who have overstayed their visas, according to the Government Accountability Office (GAO).

According to testimony from Rebecca Gambler, director of the Homeland Security and Justice for GAO, on May 21, 2013 before the House Subcommittee on Border and Maritime Security, DHS identified 1,901 illegal overstays of concern in 2011. As of March 2013, 14 percent remain missing.

The 1,901 cases were reprioritized for further investigation by DHS “because the subjects of the records could pose national security or public safety concerns.”

Of those that pose security threats, 266 could not be located, and nine individuals had been arrested.