Mexican federal police and immigration agents raided a train in southern Mexico on Wednesday that is popular 'one-way ticket' for Central American migrants looking to journey to the southern border of the United States.

According to the National Immigration Institute, hundreds of immigrants were removed from the train, known as 'La Bestia' or 'The Beast,' during Wednesday's sting because they did not possess the correct travel documents.

Around 100 migrants accepted help from the immigration agency. The rest were allowed to continue on foot.

It is unclear if those that accepted assistance were detained or processed for deportation.

Central American migrants dreaming of entering the United States are risking their lives by traveling aboard a freight train known as 'La Bestia' or 'The Beast'

Volunteers assist paramedics to lower the body of José Elías Villalta Benavides, a 25-year-old man from El Salvador who suffered a fatal heart attack on the train on Monday

A young girl climbs to the top of a freight train that has been a popular mode of transport for Central American migrants heading to the Gulf state of Veracruz

The National Immigration Institute said none of the migrants traveling aboard the freight train, which has been dubbed 'El Tren de la Muerte' or 'The Train of Death,' had legal travel documents.

On any given day, children could be spotted sitting on any section of a freight train despite warnings from the Mexican government

Central American migrants often sit on top the box cars of the freight train or struggle with dangerously high temperatures inside the wagons

Carlos Vazquez (left) from Honduras asked Mexico's president to show more compassion after reports surfaced of women and children being forcefully arrested

Carlos Vazquez from Honduras claimed he was beaten by officials after he was removed from the train in a similar sting earlier this week.

'What I say to the president of Mexico is that we are only passing through and that women and children should not be arrested and beaten like us all because we are all human,' Vazquez told Estrella TV this week.

Those that board the train see it as their best option to head north towards the Mexico-United States border.

With President Donald Trump mounting pressure on the Mexican government to stop the wave of migrants crossing through Mexico from Central America, Mexican immigration authorities have started to crack down on undocumented migrants that journey on the trains or hitchhike on trucks and buses.

Mexico's immigration agency on Wednesday stressed the dangers of traveling on 'La Bestia,' which departs from Chiapas and slowly steam rolls to Gulf state of Veracruz.

On any given day, as many as a thousand migrants could be seen perched on top of the wagons or sitting inside the cargo cars that lack air conditioning systems. This is particularly dangerous for children that regularly make the journey.

On early Monday, a 25-year-old man from El Salvador suffered a fatal heart attack while riding on the train's roof.

Central American migrants (pictured) on 'La Bestia' in a recent picture

Central American migrants hold the Honduran national flag while moving on the train through the central state of Oaxaca

According to Mexican outlet Noticieros Televisa, José Elías Villalta Benavides was one of about 700 migrants riding 'La Bestia' along with a family member that departed on from Chiapas on Sunday afternoon.

He became sick in Ixtepec, a city in Oaxaca.

A paramedic who treated Villalta Benavides said the he was dehydrated and started vomiting before he suffered cardiac arrest.

The body of Salvadoran national Jose Elias Villalta Benavides was removed from the train early on Monday after he died from a heart attack