Volcanic rocks and steam injured at least 10 people, including tourists and scientists, following an explosion on Sicily's Mount Etna yesterday, witnesses and media reported.
Tourists had been drawn to Etna to observe the spectacle of the active volcano erupting, only to be caught by surprise when spewing magma hit snow, causing an explosion.
The president of the Italian Alpine Club chapter in Catania, Umberto Marino, was travelling up the volcano in a snowcat when injured people started running in his direction.
"The material thrown into the air fell back down, striking the heads and bodies of people who were closest," Marino was quoted by the Catania Today website as saying.
According to Italian news agency ANSA, six people were hospitalised, mostly with head injuries. None of the injuries was listed as grave.
Among those present on the mountain at the time of the midday explosion were scientists from Italy's volcanology institute. The institute said its staff were among the injured, but did not immediately have details of how many or how badly they were hurt.
The BBC's global science reporter, Rebecca Morelle, also was on the mountain, and described the experience in a series of tweets.
"Running down a mountain pelted by rocks, dodging burning boulders and boiling steam - not an experience I ever ever want to repeat," she wrote.
The BBC crew was shaken, but physically OK, having suffered cuts, bruises and burns, she wrote.
Morelle said the explosion was "a reminder of how dangerous (and) unpredictable volcanoes can be."
Mount Etna has been active for the past two days, creating a visual spectacle as it spews lava and ash into the air. A new lava flow started from the southeastern crater on Wednesday.
So far it has not disrupted traffic at the nearby Catania airport or created inconvenience for residents in the area.