Washington (CNN) The Trump administration is considering a travel ban-like executive action that would block certain asylum seekers at the Mexican border, the San Francisco Chronicle reported Thursday.

The proposal is not yet finalized and may ultimately be discarded, sources familiar with the discussions told the Chronicle. Sources spoke on the condition of anonymity to the Chronicle because the plan is in formative stages. The New York Times and Politico later confirmed the thrust of the report Thursday.

"The situation remains fluid and many options to deal with the caravan remain on the table," a Department of Homeland Security source told CNN.

If approved by the President, the order would be a dramatic escalation of enforcement at the southern border, as a caravan of migrants from Central America is moving through Mexico headed toward the United States.

Earlier Thursday, CNN reported Defense Secretary James Mattis is expected to sign deployment orders that could send 800 or more troops to the southern border to help Border Patrol authorities.

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