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A spectacular volcanic eruption sent a three-kilometre column of smoke and ash billowing into the sky.
Popocatepetl, which straddles the central Mexican states of Puebla and Morelos, triggered health and safety warnings to people in nearby towns .
People were urged to stay away from the site after the explosion sent lava trundling down the hillside - and experts fear it could blow again.
Popocatepetl lies around 90km (56 miles) from Mexico City.