Mount Etna, Europe's tallest and most active volcano, has erupted again, spewing a plume of ash and rock "several kilometers high," according to authorities. Video posted to social media showed tourists fleeing the scene. About a dozen tour operators work on Etna at any given time, the Sicilian Civil Protection Agency told CNN. All tourists and trekkers on the volcano when it erupted have been evacuated safely, according to the National Institute of Geophysics and Volcanology in Italy. Read more

VOLCANO ERUPTION: CCTV footage captured the moment Mount Etna erupted, sending steam and ash into the sky over Italy on Monday (6/2). The National Institute of Geophysics and Volcanology said the collapse of material from the flank of a crater most likely caused the cloud. | CBS Newspath