Paramedics attend Honduran migrant Jose Alainez, 49, who suffered an epileptic seizure while walking north with other migrants, before taking him to the hospital in Guatemala City, early Thursday, Oct. 18, 2018. Alainez, traveling alone, had to leave the caravan of more than 2,000 Hondurans trying to wend its way to the United States. (AP Photo/Moises Castillo)
Paramedics attend Honduran migrant Jose Alainez, 49, who suffered an epileptic seizure while walking north with other migrants, before taking him to the hospital in Guatemala City, early Thursday, Oct. 18, 2018. Alainez, traveling alone, had to leave the caravan of more than 2,000 Hondurans trying to wend its way to the United States. (AP Photo/Moises Castillo) Credit: Moises Castillo

Central Americans traveling in a mass caravan broke through a Guatemalan border fence and streamed by the thousands toward Mexican territory Friday, defying Mexican authorities’ entreaties for an orderly migration and U.S. President Donald Trump’s threats of retaliation.

Arriving on the Mexican side of a border bridge, they were met by a phalanx of police with riot shields. About 50 managed to push their way through before officers unleashed pepper spray and the rest retreated.

The gates were closed again, and a federal police officer used a loudspeaker to address the masses, saying, “We need you to stop the aggression.”

Waving Honduran flags and carrying umbrellas to protect against the sun, the migrants arrived earlier at the Guatemalan side of the muddy Suchiate River that divides the country from Mexico, noisily demanding they be let in.

“One way or another, we will pass,” they changed, clambering atop to U.S.-donated military jeeps parked at the scene as Guatemalan police looked on.

Young men began tugging on the fencing and finally succeeded in tearing it down, and men, women and children rushed through and toward the border bridge just up the road.

Edwin Santos of San Pedro Sula was one of the first to race past helpless Guatemalan police, clutching the hands of his father and wife.

“We are going to the United States!” he shouted euphorically. “Nobody is going to stop us!”

Earlier Friday, Mexico’s ambassador to Guatemala said his country intended to enforce what he called a policy of orderly entry in the face of the thousands trying to cross.

Ambassador Luis Manuel Lopez Moreno added that more than 100 migrants had been allowed to cross the bridge to apply for refugee status, including some who were from the caravan and others who were not.

Meanwhile, the rafts that normally ferry throngs of people across the river were carrying mostly merchandise and the raft operators said they had been warned by Mexican authorities not to carry people.

Jose Porfirio Orellana, a 47-year-old acorn and bean farmer from Yoro province in Honduras, said he hopes to reach the United States due to woeful economic conditions in his country.

“There is nothing there,” Orellana said.

The first members of the 3,000-strong caravan began arriving in the Guatemalan border town of Tecun Uman on buses and trucks early Thursday, but the bulk of the group sloshed into town on foot in a downpour late in the afternoon and into the evening.

As the sun rose, a military helicopter flew along the Mexican side of the river foreshadowing the difficulties they could face. At the same time, several busloads of Mexican federal police in riot gear deployed at the border crossing in Ciudad Hidalgo.

Jonathan Guzman, who joined the mass procession caravan, said he dreams of finding a construction job in Los Angeles. “It’s the third time that I’m trying to cross,” the 22-year-old Salvadoran said.