The Rapid DNA testing, as it's known, involves a cheek swab and can, on average, provide results in about 90 minutes, a senior Immigration and Customs Enforcement official said.

The pilot program will run for two to three days in two border locations, the official added.

It's the latest move by the Trump administration to address the swell of migrants, predominantly families and children from Central American countries, at the border using a wide variety of technology and increased resources to fight illegal immigration.

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