Indonesia’s first crop circles have appeared -- and locals call it evidence of alien life.

Found in a rice field in a hamlet of Sleman, Yogyakarta, the crop circle consists of triangles and circles with a diameter of about 70 meters. While some observes say the shapes are manmade, local scientists and government officials are struggling for a concrete explanation, leaving UFO enthusiasts murmuring of extraterrestrials.

"According to several residents, they saw a tornado on Saturday evening," said Ngadiran, one of six farmers who owns the land in Sleman. "On Sunday afternoon, we saw the footprint in our fields."

The pattern was first reported by a farmer, Tukiman, on Sunday at 6 a.m. His story drew hordes of people, causing heavy traffic congestion in the region. Enthusiastic locals all seem to have their own theory on the genesis of the mysterious occurrence.

"I think they were left by an alien space ship, like one I saw on TV," Krasakan resident Cahyo Utomo told the Jakarta Post on Monday. "It is impossible that this was made by wind or any animal."

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