They were discovered after officials inspecting an uncovered drainage hole near the U.S.-Mexico border were told by a motorist that several people had jumped into the storm drain.
A robotic camera was sent into the pipe and located the trapped people. A witness says the group entered the drain Saturday morning. They were found later that night.
The two women and four of the men were returned to Mexico.
Another man who had previously been deported was placed under arrest as a repeat offender, and a 16-year-old boy was turned over to the Mexican consulate in San Diego.
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