46 found dead inside semi-truck:

San Antonio Fire Department Chief Charles Hood said 16 others were taken to local hospitals. 12 of them are adults.

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San Antonio Mayor Ron Nirenberg said. "It's sad, they had families and were probably trying to find a better life.

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Ron Nirenberg further said that the tragic death of 46 people is no less than a horrific human tragedy.

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San Antonio Police Chief William McManus said three suspects in connection with the case had been taken into custody.

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According to San Antonio police, it is unknown at this time whether those detained are fully linked to this.

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The US Department of Homeland Security was alerted by San Antonio Police to "an alleged human trafficking incident".

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Officials are yet to immediately confirm whether the victims were migrants or which country they were from.

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