Europe's most active volcano, Mount Etna on Sicily, is erupting again, sending tourists running away from a huge plume of ash and smoke in the air and lava flowing down its slope.

Italy's Mount Etna has erupted in spectacular fashion, sending ash, gas, and other volcanic material high into the sky above Sicily. Watch footage of the eruption.

A massive volcanic eruption occurred at Mount Etna on the Italian island of Sicily on Monday, shooting massive ash plumes ...