See photos of Volcano of Fire in Guatemala eruption

A massive volcano in Guatemala is erupting and authorities have evacuated nearly 300 families while warning another 30,000 people in the area they could be at risk.

The eruption at Volcano of Fire started overnight, spewing a dark cloud of ash. There are no immediate reports of casualties.

Guatemala's Conred disaster center said the volcano, named Fuego – Spanish for "fire" – was sending "pyroclastic flows," a high-temperature mix of gas, ash and rock fragments, "through the ravines of the volcanic complex."