Thousands of people have flocked to a Mexican city where crop circles spanning seven-hectares appeared on Christmas Eve.
Residents of Texcoco, some 15 miles from Mexico City, reportedly saw bright lights on Thursday night and the following morning spotted the patterns in the barley field.
According to a local newspaper, police received an anonymous call from a woman claiming to have seen 'the presence of aliens in farming areas and various figures in the crops'.
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Mexicans have joked on social media that the 'aliens' responsible could be drunk, as the circles are not well shaped; a local website reported that the crop circles could be an 'alien sign'
Read more: Texcoco Crop Circle