Rescue workers have called off a week-long search for three missing treasure hunters in Arizona's forbidding Superstition Mountains.

The local sheriff said that the three men had probably died from dehydration during their trek in the unforgiving landscape.

The adventurers left on July 6 in search of The Lost Dutchman's Gold Mine, telling their families that they would be back in four days. Their vehicle was found on July 11 with no trace of the men, Maricopa County Sheriff Joe Arpaio said in a statement.

Treasure hunters have been looking for the Lost Dutchman mine for more than a century....