The migrants are moving slowly, mostly by foot, and are still hundreds of miles from the United States border. Rights organisations decried the earlier announcement, describing it as an abuse of the military to "further [the president's] anti-immigrant agenda of fear and division".
It's unclear whether the restrictions would apply only to those traveling in the caravans or would extend beyond the caravans to all people trying to enter the country.
The decision to deploy such a large number of troops in the days before the Midterm elections has resulted in accusations from critics of the President that he is using the issue as a political stunt created to fire up a base concerned about immigration.
Trump has railed against illegal immigration, including several caravans of migrants from Central America slowly moving on foot toward the US border.
Trump spoke on the way to a Florida campaign stop as a fourth caravan began forming, and after the Pentagon on his orders was dispatching 5,200 U.S. military forces to the U.S. -Mexico border.
The president began his remarks by saying that the caravans should turn back because they won't be allowed entry. He said he told the armed troops deployed to the border that they could open fire if migrants throw rocks at them, something Border Patrol agents have done in the past. "And we are putting up temporary facilities, eventually people won't be coming here anymore when they realize they can't come through".
Manchester United hold on to beat Everton
Juventus vice-president Pavel Nedved has played down talk of a potential reunion with Manchester United midfielder Paul Pogba . Ademola Lookman prepared to come on around the hour mark, coming on to replace Bernard in the 62nd minute.
In excerpts of an interview with Axios made public yesterday, the president said he plans to sign an executive order ending birthright citizenship for babies of non-citizens and unauthorized immigrants born on USA soil.
Critics say the president's plan to deploy thousands of troops to the Southwest border is simply a political stunt ahead of next week's midterm election.
Navarrete told a news conference Wednesday that "Here we are talking about a humanitarian crisis of a lack of jobs, a lack of opportunities, and the use by third parties of a vulnerable population group like the migrants".
He also said asylum seekers must go to ports of entry in order to make a claim.
Meanwhile, Trump has also vowed that the illegal migrants won't be allowed to cross into the U.S. In recent years, such operations have been carried out by National Guard forces, largely part-time military members often called upon to respond to domestic emergencies.
In his Wednesday tweet, Trump highlighted the case of Luis Bracamontes, a twice-deported immigrant from Mexico sentenced to death in California for killing two police officers. That ad depicted a mug shot of an African-American felon named Willie Horton, a convicted murderer, who was let out under a weekend furlough program supported by his Democratic opponent, Massachusetts Gov. Michael Dukakis. There was no indication from officials whether the request to transport the perhaps 4,000 people remaining in the group would be granted.
The spot includes expletives uttered by Bracamontes during his trial professing regret at not killing more officials.