The director of field operations for Customs and Border Protection (CBP) in San Diego, said Saturday that the city is "preparing for the worst" as the migrant caravan moves through Tijuana, Mexico.

Director Pete Flores said on Fox & Friends that CBP is assessing any vulnerabilities at points of entry to the city of San Diego.

"[We] continue to build obstacles, shore up fence lines, build obstacles at points of entry or any gaps that we see potentially as concern for us," he said.

He said that CBP is watching the caravan for any protests, movement or shifting as it gets closer to the San Diego border.

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Tijuana's mayor said his city is experiencing a humanitarian crisis and that the Mexican government hasn't helped in dealing with the large number of migrants.

Flores said that his team has long been preparing for both legal and potential illegal entry attempts to cross into the U.S.

"What we are expecting is the caravan members to follow the orderly process of applying for asylum," he said. "But we are preparing for the worst, obviously."

He said that CBP in San Diego has maintained communication with the Mexican government to ensure an orderly process as the caravan approaches the border.

"They've been partnering with us on a consistent basis, a show of force on the Mexican side of the border to ensure that caravan members do not impede traffic coming up into our legal lanes of traffic northbound," he said.

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