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PHOENIX (AP) _ U.S. Border Patrol agents have found the bodies of 14 illegal immigrants in the sprawling Sonoran desert since last week, officials said Monday.

Most of the deaths have come one at a time in widely separate areas since Thursday, Border Patrol spokesman Ryan Scudder said.

Temperatures in the area reached triple digits over the weekend, and the illegal immigrants were crossing a barren desert during a severe drought. But officials said conditions were no worse than a typical summer weekend.

``We believe this is an aberration,'' Scudder said. ``I've never seen this many crossers die in a weekend.''

Many of the dead were found to the south and west of Tucson, which is about 65 miles north of the border. The victims included a 22-year-old woman, her husband and 2-year-old son.

Scudder said officials believe most probably died from heat exposure and dehydration.