Eight people were found suffering from heat exhaustion and dehydration in the back of a U-Haul truck in a parking lot near Picacho Sunday afternoon.

They were all taken to University of Arizona Medical Center. Two of the patients are in critical condition, one in serious condition and five were stable, said Patrick Calhoun a spokesman for the Avra Valley Fire District.

The truck was parked at a Shell gas station parking lot at 16543 E. Camino Adelante, near Picacho Peak, Calhoun said.

The group of suspected immigrants was found after someone called 911 to report seeing several people stagger out of the vehicle, said Tim Gaffney, a spokesman for the Pinal County Sheriff's Office.

Several people were seen running away, he said.

Three to six people were unaccounted for, Calhoun said.

When emergency crews arrived, one man was in cardiac arrest, Calhoun said. The patients are adult men, women and a 16-year-old boy.

Initial reports were that the group was traveling from Douglas to Phoenix, and the people had been in the U-Haul for three to four hours, Calhoun said.

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