New government video obtained by Fox News shows heavily armed men at the U.S.-Mexico border escorting an illegal immigrant mother and son into the U.S..

Border Patrol officials said that this is an unusual event and express concern that it will become a more regular occurrence – possibly leading to violence.

U.S. Border Patrol surveillance cameras show four to five men in full tactical gear and masks -- carrying long guns and AK-47 assault rifles – escort a Guatemalan woman and her 8-year-old child under a vehicle barrier.

The heavily armed escorts turned back across the border. The woman and child turned themselves into border agents.

The serious breach underscores what President Trump has been telling Congress for months about the crisis at the U.S. Mexico border.

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