On Sunday, while the band of migrants was resting and reorganizing in Tepanatepec, several hundred in another group more broke through border barriers in the Guatemala town of Tecun Uman just as members of the caravan did more than a week earlier.
At a news conference late Sunday, Mexican Interior Secretary Alfonso Navarrete Prida denied that his country's forces were responsible. The troops will be drawn from about 10 U.S. Army installations and consist largely of military police and engineers, one of the U.S. officials said.
Migrants wait in line beside a water truck to brush their teeth and fill water bottles, as a caravan of Central Americans trying to reach the USA border halts for a rest day in San Pedro Tapanatepec, Oaxaca state, Mexico, Sunday, Oct. 28, 2018.
Customs and Border Protection Commissioner Kevin McAleenan said Friday that the agency wasn't considering plans to have troops enforce immigration law.
Some rested in the shade of tarps strung across the town plaza, or picked up trash.
The tensions of a long trek through searing heat with tenuous supplies of food and other goods spilled over Saturday night when a dispute over a food line escalated into the beating of a man falsely accused of child stealing.
Many members of the caravan have been traveling for more than two weeks since the group first formed in San Pedro Sula, Honduras. When a man with a megaphone asked people to wait their turn, some men hurled insults at him.
The assailants caught and beat him, but police intervened and he was treated at a hospital. Hundreds of Mexican federal officers carrying plastic shields briefly blocked the caravan of Central American migrants from continuing toward the United States, after several thousand of the migrants turned down the chance to apply for refugee status and obtain a Mexican offer of benefits.
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Trump's national diversity council in 2016, said the suspect's political views shouldn't be held against the president. Sayoc was being held at an Federal Bureau of Investigation processing centre in Miramar, Florida, CNN said.
Some 150 Salvadorans, including women and children, on Sunday began heading northwards toward the USA looking for better living conditions, just like the other groups.
Others complained of a few migrants smoking marijuana or anxious that images of litter and uneaten food made them appear disrespectful.
Mexican President Enrique Pena Nieto launched a program Friday dubbed "You are home", which promises shelter, medical attention, schooling and jobs to Central Americans who agree to stay in the southern Mexico states of Chiapas or Oaxaca, far from the US border.
After another brutally hot day on the road with her husband and 8-year-old son, Alejandra Rodriguez said the possibility of health care and a work permit in Mexico sounded enticing.
US senators are urging the Trump administration to make an agreement with Mexico that would stop some of the 7,000 people traveling north from crossing the border.
"There are people fainting, there are wounded", said Rojas, who spoke to The Associated Press after dropping off a group of women and children in Tapantapec, where the caravan planned to spend the night in the town square.
Earlier this year, officials form the Department of Homeland Security, including Mr. McAleenan and Secretary Kirstjen Nielsen, publicly encouraged would-be asylum seekers to ask for refuge at ports of entry, saying that was the only legal way to apply for asylum at the USA border.
At least 60 migrants have already done so from the group stranded at the border.