The "mother of all migrant caravans" — with more than 20,000 people — could be headed toward the United States, the New York Post reported, citing Mexico's Interior Secretary Olga Sanchez Cordero.

"We have information that a new caravan is forming in Honduras that they're calling 'the mother of all caravans,' and they are thinking it could have more than 20,000 people," she said Wednesday, the paper reported.

Migrants from Honduras as well as El Salvador and Guatemala are reportedly taking part in the caravan, the Post said.

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What does an official from Honduras have to say?

Honduras' Deputy Foreign Minister Nelly Jerez said, "There is no indication of such a caravan" forming in his country, the paper reported.

What does President Trump have to say?

President Donald Trump blasted Mexico in a Thursday tweet over the flow of illegal immigrants into the U.S. and threatened to close the southern border:

"Mexico is doing NOTHING to help stop the flow of illegal immigrants to our country," Trump wrote. "They are all talk and no action. Likewise, Honduras, Guatemala and El Salvador have taken our money for years, and do nothing. The [Democrats] don't care, such BAD laws. May close the southern border!"

What else did Mexican officials say?

Mexican President Andres Manuel Lopez Obrador said Thursday his country is doing its part, the Post reported.

"We are going to do everything we can to help," he said, according to the paper. "We don't in any way want a confrontation with the U.S. government. It is legitimate that they are displeased, and they voice these concerns."

Interior Secretary Cordero said Mexico would provide a "containment" line of federal police and immigration agents to stop caravans from coming to the U.S., the Post said.

Reuters reported that a separate caravan of 1,200 migrants from Central America and Cuba began moving toward the U.S. border from southern Mexico last weekend. The Post reported its size as about 2,500.