A motorcyclist was killed in a crash in Cochise County Wednesday afternoon while traveling from Tombstone towards Sierra Vista, authorities said.

The Sierra Vista man, whose name was not released, may have suffered a medical issue, causing the crash, said Carol Capas, a Cochise County Sheriff's spokeswoman.

The crash occurred shortly before 1 p.m. at mile post 9 on Charleston Road.

When Sierra Vista police officers arrived on scene, they found the man unresponsive and began CPR, said Capas. He was traveling on a Yamaha cruiser.

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Medical personnel pronounced the man dead at the scene. An autopsy will be performed by the Pima County Medical Examiner's Office.

No further information was immediately available. 

Contact reporter Carmen Duarte at cduarte@tucson.com or 573-4104. On Twitter: @cduartestar