American driver is arrested after more than 100 migrants from Central America and Mexico are found crammed into a stolen tractor trailer without masks in Texas

A U.S. Customs and Border Protection canine broke up a human smuggling attempt on a highway in Texas, helping the agents detain 100 undocumented immigrants who were unlawfully in the country.

CBP said through a press release that agents on Interstate Highway 35 stopped the tractor trailer as it approached the checkpoint site Wednesday afternoon.

Following the initial search of a United States citizen operating the truck, the Border Patrol service dog alerted the agents and led them to the trailer where a secondary inspection took place.

Pictured above are the 100 undocumented immigrants from Mexico, Honduras and Guatemala who were found hiding inside a tractor trailer that was stopped on a highway by CBP agents Wednesday in Laredo, Texas

CBP broke the lock to the pickup truck after a service canine led them to the trailer, where the Border Patrol agents discovered 100 undocumented immigrants Wednesday

CBP's agents were able to break the lock open and discovered the individuals cramped inside the trailer. It was around 60 degrees Fahrenheit inside.

The migrants, citizens of Mexico, Honduras and Guatemala, were not wearing personal protective equipment and received medical attention on location. None of the individuals required hospitalization.

The Webb County Sheriff's Office said the trailer and tractor had been reported stolen.

The undocumented immigrants and the driver were taken into custody pending an investigation by Special Agents of Homeland Security Investigations. 

A CBP spokesperson was unable to confirm if there were any children present when contacted by DailyMail.com on Friday

CBP said that human smugglers continued to disregard the COVID-19 pandemic as they try to ferry undocumented immigrants in the country after they have unlawfully made their way in from Mexico

A second CBP official told DailyMail.com that investigators didn't know how long the individuals had been in the United States for. 

The official explained that CBP inspects close to 1.9 million trucks that cross through the port of entry annually. 

The migrants could have been relocated from a stash house where they had been staying or it may have been possible that they had been inside the container when the driver picked up at the trailer at a station.

'We continue to see dangerous tactics being used by smugglers, including packing 100 people into a tractor trailer,' Laredo Sector Chief Patrol Agent Matthew J. Hudak. said in the press release statement. 'As COVID-19 remains a threat to our agents, our healthcare workers, and the public, smugglers continue to knowingly irresponsibly put everyone at risk in order to make a profit.' 

Pictured above are the 117 undocumented immigrants who were concealed inside a trailer that was stopped in Texas by U.S. Border Patrol agents in Laredo, Texas, on September 29 during a roadside inspection 

The discovery came a week after Border Patrol agents from the Cotulla Station encountered 117 migrants hidden inside a trailer while they were being ferried on U.S. Highway 83.

The truck driven by a U.S. citizen was stopped at a checkpoint the evening of September 29 in Laredo. A canine dog led the agents to the trailer were the found 117 undocumented immigrants from Mexico and Guatemala.