Reuters) - Four members of a Kurdish group that opposes Islamic State militants were arrested last month trying to enter the United States from Mexico, U.S. Homeland Security Secretary Jeh Johnson said on Thursday.
Johnson's announcement followed comments by conservative politicians that fighters from the Islamic State, which is the target of a U.S.-led air offensive in Syria and Iraq, had crossed the southern border.
U.S. intelligence and national security officials said that U.S. agencies had no evidence that anyone connected with the Islamic State or other jihadist groups fighting in Iraq or Syria have tried to cross into the United States from Mexico.
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