MEXICO CITY (AP) — Venezuelan migrants handed over to Mexico like it's a U.S. immigration detention facility. Families from Central Asia flown to Panama and Costa Rica to await voluntary repatriation to their countries. Venezuelans from Guantanamo Bay handed off on a Honduran tarmac and returned to Caracas.

It all sends the unmistakable message that trying to get to the U.S. border is no longer worth it. U.S. President Donald Trump’s administration has laid the groundwork to reverse the region’s migration flow. And while the numbers remain modest, an outline of how the U.S. hopes to overcome limited detention space as it gears up its deportation machine is emerging.

Making deals across Latin America

In its first month, the Trump administration has reached deals with Mexico, Guatemala, El Salvador, Honduras, Costa Rica and Panama to act as stopovers or destinations for migrants expelled from the U.S. It has brokered deals with Venezuela to pick up its people in Texas, Guantanamo Bay, Cuba and Honduras.

But none of the agreements have been detailed for the public, raising concerns about evading international protections for refugees and asylum-seekers. Adam Isacson, a researcher with the Washington-based human rights advocacy organization WOLA, suspects many were little more than improvised “handshake deals.”

They were requests made while Trump threatened tariffs and to take back the Panama Canal. U.S. Secretary of State Marco Rubio moved through the region while U.S. foreign aid was suspended, bestowing exemptions when merited.

Trump made deals during his first presidency with Mexico, Guatemala, Honduras and El Salvador to take in asylum-seekers, though only Mexico and Guatemala actually received them.

But the agreements in his second term are more varied, ranging from Honduras letting Venezuelans get off a U.S. plane and board a Venezuelan one in its territory last week, to El Salvador offering to imprison deportees — and even U.S. citizen prisoners.

“They’re being much more ambitious now,” Isacson said. “The idea of sending people to be warehoused like goods, to deport them to third countries wasn’t an issue” in Trump’s first term.

The numbers remain relatively small, but images of deportees deplaning in shackles and deportees holding up signs asking for help in the Panama hotel where they're held are powerful.

‘Shock and awe’ to get things started

This is still a preliminary phase because Congress has not approved a new budget, Isacson said. “While they’re at that lowest level of resources they are doing all of the shock and awe possible,” he said. “The idea is to scare them.”

Now the migration flow that is visible is of deportations and migrants boarding boats in Panama to take them south to Colombia rather than migrants riding trains north through Mexico or massing at the U.S. border.

In just a month, Mexico has received more than 3,300 foreign deportees, who advocates say were from at least seven nationalities.

A number of them carried unusual U.S. Immigration and Customs Enforcement documents that read: “Reason for transfer: removal. Name of new facility (immigration): MEXICO.” They appear to have nothing to do with the Remain in Mexico program from Trump’s first term that made asylum-seekers wait out the U.S. process from Mexico.

President Claudia Sheinbaum has said little about Mexico’s participation other than highlighting her administration’s willingness to cooperate. The U.S. Department of State has praised Mexico for receiving deportation flights and for returning migrants from elsewhere to their countries.

Farther south the numbers are smaller, but the imagery has been stronger.

Panama, a bridge in the other direction

Panama, where more than 500,000 migrants passed en route to the U.S. border in 2023, suddenly became a bridge this month for U.S. efforts to deport asylum seekers. Nearly 300 U.S. deportees from 10 mostly Asian countries were held in a Panama City hotel. Some put signs to their windows that read “Help” and “We are not save (sic) in our country.”

About one-third of those in the hotel who refused to voluntarily return to their countries were then sent to a remote camp back in the very jungle they had probably crossed in the other direction. One deportee in the camp told The Associated Press they were not informed of their rights and weren't told how long they would be in the camp, which concerned her because of its poor conditions.

Similar flights landed in Costa Rica last week and they were sent to a remote facility that had also previously received migrants headed north.

In addition to those flights, 50 to 75 migrants are moving south through Costa Rica on their own daily, according to Omer Badilla, Costa Rica’s vice minister of the interior.

He raised the possibility of Panama and Colombia getting involved to organize boat trips south for migrants, but neither of those governments has publicly confirmed their involvement. Panama and Costa Rica say U.N. agencies are assisting with the repatriations and that the U.S. government is paying.

The International Organization for Migration said that it was helping authorities provide basic services and facilitating voluntary repatriations “when it is safe to do so.”

“With the old flow (south to north) the situation is pretty under control,” Panamanian President José Raúl Mulino said Thursday. “That shows that now the problem is coming in the opposite direction and we hope that can be managed in an orderly fashion.”

Concerns about vulnerable migrants

Even with the involvement of U.N. agencies, concerns abound about vulnerable migrants being passed from country to country and even sent back to countries they fled.

Advocates worry the U.S. may be using third countries to deport migrants from countries where the U.S. may not have diplomatic relations or strained ones, to get around constraints in international law that are supposed to prevent people from being sent back to places they would not be safe.

Gretchen Kuhner, director of IMUMI, a nongovernmental legal services organization in Mexico, said recently a flight carrying Venezuelans from the United States to Venezuela made a stop in Cancun. But IMUMI wasn’t able to speak with the migrants aboard directly to know if they wanted to try to request asylum in Mexico while in the country’s territory.

Isacson said among the Venezuelans sent back to that country have been people who deserted the armed forces, who would now be in the hands of the military. The risks could be even more dire for some migrants from Iran and Afghanistan.

The region’s governments are understandably sensitive about appearing to be aiding in Trump’s deportation efforts, but Isacson said transparency will better shield them from those criticisms.

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Associated Press journalist Juan Zamorano contributed to this report from Panama City.

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Follow AP's coverage of Latin America and the Caribbean at https://apnews.com/hub/latin-america

Venezuelan migrants arrive at Panama's Caribbean coastal island of in Gardi Sugdub, Sunday, Feb. 23, 2025, to board boats to Colombia after giving up hopes of reaching the U.S. while in southern Mexico as President Trump cracks down on migration. (AP Photo/Matias Delacroix)

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FILE - Migrants wearing face masks and shackles on their hands and feet sit on a military aircraft at Fort Bliss in El Paso, Tx., Jan. 30, 2025, awaiting their deportation to Guatemala. (AP Photo/Christian Chavez, File)

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A migrant peers through the window of a plane carrying Venezuelan migrants deported from the United States after it landed at the Simon Bolivar International Airport in Maiquetia, Venezuela, Monday, Feb. 24, 2025. (AP Photo/Cristian Hernandez)

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FILE - Venezuelan migrants deported from the United States deplane at the Simon Bolivar International Airport in Maiquetia, Venezuela, Feb. 20, 2025. (AP Photo/Cristian Hernandez, File)

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FILE - A migrant deported from the United States stands in a hotel room in Panama City, Feb. 21, 2025. (AP Photo/Matias Delacroix, File)

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FILE - A migrant deported from the United States stands in a hotel room in Panama City, Feb. 20, 2025. (AP Photo/Matias Delacroix, File)

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FILE - Protesters shout slogans during a pro-migrant rally, demanding an end to deportations in New York, Feb. 9, 2025. (AP Photo/Andres Kudacki, File)

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FILE - Mexican President Claudia Sheinbaum greets guests as she arrives for a Housing for Wellbeing even, in Mexico City, Feb. 1, 2025. (AP Photo/Marco Ugarte, File)

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Migrants wind down during sunset on Gardi Sugdub Island, on Panama's Caribbean coast, Sunday, Feb. 23, 2025, where they will overnight before attempting to board boats to Colombia the following day after turning back from southern Mexico, abandoning hopes of reaching the U.S. amid President Trump's crackdown on migration. (AP Photo/Matias Delacroix)

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FILE - Venezuelan migrant Gabriela Villanueva holds her daughter, in Chepo, Panama, Feb. 22, 2025, during a stop on their journey from southern Mexico to Puerto de Cartí on Panama's Caribbean coast, seeking a boat to Colombia from where she will return to Venezuela. (AP Photo/Matias Delacroix, File)

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FILE - Venezuelan migrants play dominoes in Puerto Carti, on Panama's Caribbean coast, Feb. 22, 2025, where they plan to board boats to Colombia after turning back from southern Mexico where they gave up hopes of reaching the U.S. amid President Trump's crackdown on migration. (AP Photo/Matias Delacroix)

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Venezuelan migrant Estebani Llerena, left, sleeps next to her daughter in Puerto Cartí, on Panama's Caribbean coast, Sunday, Feb. 23, 2025, where they plan to take a boat to Colombia after giving up hopes of reaching the U.S. while in southern Mexico amid President Trump's crackdown on migration. (AP Photo/Matias Delacroix)

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Luis Sanchez, center, sits with other Venezuelan migrants on a boat leaving Gardi Sugdub on Panama's Caribbean coast, Sunday, Feb. 23, 2025, after giving up hopes of reaching the U.S. while in southern Mexico amid President Trump's crackdown on migration. (AP Photo/Matias Delacroix)

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FILE - U.S. Secretary of State Marco Rubio, left, meets with President Nayib Bukele at his residence at Lake Coatepeque, El Salvador, Feb. 3, 2025. (AP Photo/Mark Schiefelbein, File)

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