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At least 46 found dead in tractor-trailer after suspected smuggling incident in Texas: Officials

(SAN ANTONIO) — At least 46 people were found dead inside a tractor-trailer in San Antonio on Monday in a suspected case of human smuggling, authorities said.

An additional 16 people — 12 adults and four children — were transported to area hospitals after what officials called a “mass casualty event.”

Chris Magnus, commissioner of the U.S. Customs and Border Protection (CBP), told reporters he was “horrified” by the incident.

“Horrified at this tragic loss of life near San Antonio,” Magnus said Monday night. “This speaks to the desperation of migrants who would put their lives in the hands of callous human smugglers who show no regard for human life.”

The incident unfolded Monday evening at around 5:50 p.m. local time, when a nearby worker heard a cry for help and found the tractor-trailer with the doors partially opened and a number of deceased people inside, according to San Antonio Police Chief Bill McManus.

The trailer was refrigerated but did not have a visibly working air-conditioning unit and there were no signs of water inside, according to San Antonio Fire Department Chief Charles Hood.

The victims taken to hospitals were hot to the touch and all suffering from heat stroke and heat exhaustion, Hood said. There are no child fatalities that authorities know of, he added.

Three people are in custody in connection with the incident, according to McManus, who added that the case is now a federal investigation.

A spokesperson for the U.S. Immigration and Customs Enforcement (ICE) told ABC News that Homeland Security Investigations (HSI) responded to a call on Monday regarding an alleged human smuggling event and, upon arriving at the scene, confirmed the death of more than 40 people.

“HSI continues its enforcement efforts to ensure the safety and well-being of our communities. We will continue to address the serious public safety threat posed by human smuggling organizations and their reckless disregard for the health and safety of those smuggled,” the ICE spokesperson said in a statement. “To report suspicious activity, we encourage people to call the HSI Tip Line at 1-866-DHS-2ICE. All calls are kept confidential.”

“Details will be released as they are available, the criminal investigation remains ongoing,” the ICE spokesperson added. “HSI continues its enforcement efforts to ensure the safety and well-being of our communities.”

The San Antonio Fire Department confirmed to ABC News that HSI and CBP are taking over the investigation from local authorities.

CBP is the umbrella agency of the U.S. Border Patrol, which responded to assist at the scene and is supporting ICE in the federal investigation, according to Magnus, the CBP commissioner.

“We will be working with our federal, state and local partners to assist in every way possible with this investigation,” Magnus told reporters Monday night.

U.S. Secretary of Homeland Security Alejandro Mayorkas took to Twitter to say that he was “heartbroken by the tragic loss of life today and am praying for those still fighting for their lives.”

“Far too many lives have been lost as individuals — including families, women, and children — take this dangerous journey,” he tweeted Monday night. “Human smugglers are callous individuals who have no regard for the vulnerable people they exploit and endanger in order to make a profit. We will work alongside our partners to hold those responsible for this tragedy accountable and continue to take action to disrupt smuggling networks.”

Earlier this month, the U.S. Department of Homeland Security (DHS) released more details on the Biden administration’s efforts to combat human smuggling and unauthorized migration in conjunction with the Summit of the Americas held in Los Angeles.

The series of operations launched across the Western Hemisphere is part of the largest human smuggling crackdown ever seen in the region, with more than 1,300 deployed personnel and nearly 2,000 smugglers arrested in just two months.

Agencies from across the administration, including the intelligence community and the U.S. Treasury Department, have engaged to disrupt smuggling operations in real-time and strip down the financial backing of the transnational criminal organizations that coordinate these crimes.

“The Biden administration is focused on putting these organizations out of business,” DHS said in a recent statement prior to Monday’s incident. “But human smuggling is, by definition, a transnational problem and we are committed to working with our regional partners in the Americas to commit our collective expertise and resources to put an end to human smuggling.”

ABC News’ Luke Barr, Marilyn Heck, Josh Margolin and Morgan Winsor contributed to this report.

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