U.S. Border Patrol Deputy Chief Patrol Agent Roy Villareal said Monday that he's never seen anything like what's happening at the U.S.-Mexico border in his 30 years of service.

"The situation at the border is unprecedented," he said on "Fox & Friends." "We are being overwhelmed with migrants, principally family units and children, and then people that are from countries other than Mexico."

Villareal said for the first time in the Border Patrol's history, the majority of its arrests are "other-than-Mexican nationals."

He said an "entire border enforcement system" is needed on the ground, although there is "no singular solution" to the issues there.

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"[We need] a border infrastructure, roads that provide access to the border, technology, ground sensors, night vision cameras, drones and then of course wall or fencing to secure the border," he said.

Villareal attested to his decades of service that walls or fencing do work in securing borders.

"As soon as we put in infrastructure and fencing, add technology and agents, it has a dramatic impact on that flow of illicit migrants, illicit narcotics and it brings control to the border," he said.

Watch the discussion from "Fox & Friends" above.

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