Authorities in Ecuador have begun evacuating people from the slopes of the Tungurahua volcano after it started emitting ash.
Scientists from the Geophysics Institute say fast-moving currents and extremely hot gas and rock were flowing from the crater on Saturday.
The volcano, which is about 130km south-east of the capital Quito, has been active since 1999. There was a strong eruption in 2008.
Tungurahua means 'Throat of Fire' in the Quechua language. It is one of Ecuador's eight active volcanoes.