Hundreds of thousands of people living south of the Ecuadorean capital, Quito, could be at risk from an eruption of the Cotopaxi volcano, officials say.
The volcano, located about 50km (30 miles) from the city, last erupted on Saturday, prompting President Rafael Correa to declare a state of emergency.
Risk Management Minister Maria del Pilar Cornejo said 325,000 people lived in areas that could lie in the path of mud and rock flows from the Cotopaxi.
Its last major eruption was in 1877.
Dangerous history
Cotopaxi is one of Ecuador's most active volcanoes and, at 5,897m (19,347 ft), its second-highest peak after the Chimborazo.
On Friday, it shot ash 12km (seven miles) into the air.
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