The country deployed 1,000 immigration agents in the north and south of Mexico amid heightened pressure from the US to reduce the surge of mostly Central American migrants through its territory
"Mexico does not act on the basis of threats. We are a great neighbour, " Foreign Minister Marcelo Ebrard said on Twitter after Trump threatened to close the US-Mexico border, again.
US President Donald Trump declared a national emergency last month in a bid to fund his promised border wall without congressional approval.
Cynicism and opposition are growing in the US to President Donald Trump's declaration of a national emergency to try to get his wall built on the border with Mexico.
US President Donald Trump declared the emergency on Friday in an effort to go around Congress to fund his border wall.
US President Donald Trump demanded Congress include money for the wall, one of his biggest 2016 campaign promises, in a funding bill he was expected to sign either later on Friday or Saturday.
The partial government shutdown was on track on Friday to become the longest closure in US history as President Donald Trump and nervous Republicans scrambled to find a way out of the mess.
As Trump continues to insist on the need for a border wall, thousands of people from Honduras, Guatemala and El Salvador have been arriving in Mexico with the aim of getting into the US. Most of them say they are fleeing violence.
Passions are ablaze in the US capital where the government is partially shut down over the president's demand for a border wall which critics say is unnecessary. Each side took their case to the people on Tuesday.
Democrats backed by new Speaker Nancy Pelosi pass legislation that would end a 13-day partial government shutdown, ignoring President Trump's demand for $5 billion for a border wall with Mexico.
Romania is facing a rush of migrants who are making their way towards western Europe after neighbouring Hungary built a wall at its border with Serbia, making it harder for asylum seekers to travel onwards.
Tribal leaders Native American tribes fear a proposed border wall as envisioned by US President Donald Trump will sever access to the Rio Grande river's water, spoiling religious traditions and ruining ancient culture for the tribes.
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