Nevado del Ruiz volcano, 1 July 2012
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Colombia's Nevado del Ruiz volcano spews ash and gas

Thousands of Colombians have been evacuated from villages on the slopes of the erupting Nevado del Ruiz volcano.

Ash and gas have been spewing from the volcano in western Colombia for some months.

Some 25,000 people died in 1985 when an eruption sent a river of rocks and mud sweeping over the town of Armero.