Mexican President Andrés Manuel López Obrador on Thursday fired back at President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE, who threatened to close the southern border earlier and said Mexico is not doing anything to curb illegal immigration.

“We respect president Trump’s position, and we are going to help. That is, this is a problem of the United States, or it’s a problem of the Central American countries. It’s not up to us Mexicans, no,” López Obrador told reporters, according to Reuters.

ADVERTISEMENT

“I just emphasize that migration flows of Mexicans to the United States are very low, a lot lower,” he added. “The Mexican is no longer seeking work in the United States. The majority are inhabitants of our fellow Central American countries.”

Trump in November and again in December threatened to close the border and returned to the issue in an early morning tweet on Thursday.

“Mexico is doing NOTHING to help stop the flow of illegal immigrants to our Country. They are all talk and no action. Likewise, Honduras, Guatemala and El Salvador have taken our money for years, and do Nothing. The Dems don’t care, such BAD laws. May close the Southern Border!” Trump tweeted.

Mexico is doing NOTHING to help stop the flow of illegal immigrants to our Country. They are all talk and no action. Likewise, Honduras, Guatemala and El Salvador have taken our money for years, and do Nothing. The Dems don’t care, such BAD laws. May close the Southern Border! — Donald J. Trump (@realDonaldTrump) March 28, 2019

The president's tweet came one day after Customs and Border Protection (CBP) Commissioner Kevin McAleenan said that immigration enforcement has reached a "breaking point."

“For the first time in over a decade, CBP is performing direct releases of migrants when [Immigration and Customs Enforcement] is unable to provide bed space to relieve overcrowding,” McAleenan said.

The U.S., Honduras, Guatemala and El Salvador also agreed Wednesday to conduct joint police operations in Central America to prevent migrants from moving farther north.

A group of roughly 1,200 migrants, mostly from Central America, began making their way across Mexico toward the U.S. over the weekend, according to Reuters.