Mexico has completed its deployment of 6,000 National Guardsmen to help control the flow of migrants headed to the United States and filled 650 immigration agency posts to regulate border crossings, the government said on Friday, June 21.

The announcement by Foreign Minister Marcelo Ebrard came as Mexico put into effect a deal on irregular immigration reached with Washington to head off stiff tariffs that President Donald Trump threatened to slap on all imports from Mexico.

A Mexican official who was not authorized to speak about the deployment and requested anonymity said the National Guardsmen have not been visible in large contingents because they are spread along the southern border that stretches more than 600 miles and as well as up Mexico’s southern isthmus. They were also deployed to remote areas to target human smugglers, the official said.

An officer from the National Migration Institute stops a taxi carrying migrants from Bangladesh, at an immigration checkpoint known as Viva Mexico, near Tapachula, Mexico, Friday, June 21, 2019. Mexico's foreign minister says that the country has completed its deployment of some 6,000 National Guard members to help control the flow of Central American migrants headed toward the U.S. (AP Photo/Oliver de Ros)
An officer from the National Migration Institute stopped a taxi carrying migrants from Bangladesh, at an immigration checkpoint known as Viva Mexico, near Tapachula, Mexico, on June 21, 2019.  (Oliver de Ros/AP Photo)

The Associated Press witnessed an operation near the town of Comitán last weekend, when members of the new militarized policing force patrolled dirt roads through the jungle in the dark.

The National Guard has not reappeared on the banks of the Suchiate river across from Guatemala in Ciudad Hidalgo since early in the week. Migrants continued crossing on rafts early Friday morning. Guardsmen have been spotted intermittently in southern states supporting immigration officials at highway checkpoints.

On Friday, checkpoints near Tapachula on the main highway connecting Mexico to Guatemala operated as they have been in recent weeks. Immigration officials stopped public transportation vans and taxis to ask passengers for their documents while the guardsmen or military police looked on.

A Mexican National Guardsman stops a group of migrants from Bangladesh, India and Pakistan, at an immigration checkpoint known as Viva Mexico, near Tapachula, Mexico, Friday, June 21, 2019. Mexico's foreign minister says that the country has completed its deployment of some 6,000 National Guard members to help control the flow of Central American migrants headed toward the U.S. (AP Photo/Oliver de Ros)
A Mexican National Guardsman stops a group of migrants from Bangladesh, India, and Pakistan, at an immigration checkpoint known as Viva Mexico, near Tapachula, Mexico, on June 21, 2019. (Oliver de Ros/AP Photo)

While the bulk of the migrant traffic has been Central Americans, authorities find people from all over the world.

At a checkpoint on the outskirts of Tapachula on Friday, more than 20 migrants from Pakistan, India, and Bangladesh were detained.

Last weekend, authorities found nearly 800 migrants inside four semi-trailers traveling through the Gulf Coast state of Veracruz. Officials have said they want to focus efforts on disrupting migrant smuggling operations.

Military police wearing the insignia of the new National Guard provide perimeter security while a migration agent waits to check documents of passengers in passing transport, at an immigration checkpoint in El Manguito, south of Tapachula, Mexico, Friday, June 21, 2019. Mexico's foreign minister says that the country has completed its deployment of some 6,000 National Guard members to help control the flow of Central American migrants headed toward the U.S. (AP Photo/Oliver de Ros)
Military police wearing the insignia of the new National Guard provide perimeter security at one of the immigration checkpoints in El Manguito, south of Tapachula, Mexico, on June 21, 2019. (Oliver de Ros/AP Photo)

Since January, Mexico has detained more than 74,000 migrants and deported over 53,000, according to the latest figures available. That is expected to rise when June numbers are released.

UNICEF Executive Director Henrietta Fore said in a statement following a three-day visit to Mexico that 15,500 migrant minors were registered by Mexican migration authorities between January and April, mostly from Central America’s Northern Triangle countries. That was a 50% increase over the same period last year.

“Unless the root causes of these migration flows are addressed, the situation is unlikely to change,” she said, citing poverty, violence, gang extortion, and death threats.

Men carry loads of supplies as they cross the Suchiate river from Guatemala into Talisman, Mexico, Friday, June 21, 2019. Mexico's foreign minister says that the country has completed its deployment of some 6,000 National Guard members to help control the flow of Central American migrants headed toward the U.S.(AP Photo/Oliver de Ros)
Men carry loads of supplies as they cross the Suchiate River from Guatemala into Talisman, Mexico, on June 21, 2019. (Oliver de Ros/AP Photo)
A raft operator helps his passenger on the Mexican side of the Suchiate river in Talisman, Mexico, Friday, June 21, 2019. Mexico's foreign minister says that the country has completed its deployment of some 6,000 National Guard members to help control the flow of Central American migrants headed toward the U.S. (AP Photo/Oliver de Ros)
A raft operator and passengers on the Mexican side of the Suchiate River in Talisman, Mexico, Friday, June 21, 2019. (Oliver de Ros/AP Photo)
Rafts carry passengers and supplies across the Suchiate River between Tecun Uman, Guatemala, and Ciudad Hidalgo, Mexico, Friday, June 21, 2019. Mexico's foreign minister says that the country has completed its deployment of some 6,000 National Guard members to help control the flow of Central American migrants headed toward the U.S. (AP Photo/Oliver de Ros)
Rafts carry passengers and supplies across the Suchiate River between Tecun Uman, Guatemala, and Ciudad Hidalgo, Mexico, on June 21, 2019. (Oliver de Ros/AP Photo)
Military police wearing the insignia of the new National Guard provide perimeter security while a migration agent waits to check documents of passengers in passing transport, at an immigration checkpoint in El Manguito, south of Tapachula, Mexico, Friday, June 21, 2019. Mexico's foreign minister says that the country has completed its deployment of some 6,000 National Guard members to help control the flow of Central American migrants headed toward the U.S. (AP Photo/Oliver de Ros)
Military police wearing the insignia of the new National Guard provide perimeter security at an immigration checkpoint in El Manguito, south of Tapachula, Mexico, on June 21, 2019.  (Oliver de Ros/AP Photo)