WASHINGTON—Based on open-source research conducted on a list provided by the Department of Justice, the Subcommittee on Immigration and the National Interest has determined that at least 380 of the 580 individuals convicted of terrorism or terrorism-related offenses between September 11, 2001 and December 31, 2014, were born abroad.

On August 12, 2015, December 3, 2015, and January 11, 2016, letters were sent to the Departments of Justice, Homeland Security, and State, requesting the immigration histories of individuals implicated in terrorism since early 2014. For over 10 months, the Obama Administration refused to provide this crucial and easily accessible information. Since sending the last letter on January 11, however, the Subcommittee has identified 18 additional individuals implicated in terrorism since early 2014 – bringing the total to 131, of whom at least 16 were initially admitted to the United States as refugees, and at least 17 of whom are the natural-born citizen children of immigrants.

However, the Department of Justice (DOJ) did provide the Subcommittee with a list it maintains of 580 individuals not only implicated, but convicted, of terrorism or terrorism-related offenses between September 11, 2001 and December 31, 2014. DOJ has deferred to the Department of Homeland Security (DHS) to provide immigration background information regarding these individuals, but to this day, DHS has not done so – despite having the information on the foreign-born easily accessible in its records and databases.

Using this list, the Subcommittee conducted open-source research and determined that at least 380 of the 580 were foreign-born (71 were confirmed natural-born, and the remaining 129 are not known). Of the 380 foreign-born, at least 24 were initially admitted to the United States as refugees, and at least 33 had overstayed their visas. Additionally, of those born abroad, at least 62 were from Pakistan, 28 were from Lebanon, 22 were Palestinian, 21 were from Somalia, 20 were from Yemen, 19 were from Iraq, 16 were from Jordan, 17 were from Egypt, and 10 were from Afghanistan.

Read more: The Department of Justice Director Jeff Sessions