CHUALAR, Calif. - Message from outer space or practical joke?
Mysterious, giant crop circles have appeared on a California farm, and residents are wondering who created them.
The intricate designs were discovered just before dawn on Sunday in the town of Chualar, just south of Salinas.
Security guards have been hired to keep people from the site, allowing only media to have access.
The pattern is at least a couple hundred feet wide, according to a report from KSBW-TV.
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As of Monday night, no one had stepped forward to claim responsibility for the crop circles.