<p>Mount Etna, one of the world's most active volcanoes, belched smoke and ashes in a new eruption on Monday, briefly forcing the closure of the airport of Catania in Sicily.</p>.<p>The ash cloud rose 10 kilometres (6.2 miles) into the air above a crater on the southeast of the volcano, the INGV National Institute for Geophysics and Vulcanology said on Twitter.</p>.<p>The nearby Vincenzo Bellini international airport in Catania closed at lunchtime Monday. Although it reopened after about two hours, it warned of delays.</p>.<p>Ash covered roads, balconies and the roofs of towns nearby, Italy's civil protection agency said.</p>.<p>The INGV said it had recorded a gradual rise in volcanic-seismic tremor -- induced by escaping gases -- which could be a sign Etna is heading towards another spectacular burst of fiery lava fountaining, known as paroxysmal activity.</p>.<p>At 3,324 metres (nearly 11,000 feet), Etna is the tallest active volcano in Europe and has erupted frequently in the past 500,000 years.</p>.<p><strong>Check out DH's latest videos:</strong></p>
<p>Mount Etna, one of the world's most active volcanoes, belched smoke and ashes in a new eruption on Monday, briefly forcing the closure of the airport of Catania in Sicily.</p>.<p>The ash cloud rose 10 kilometres (6.2 miles) into the air above a crater on the southeast of the volcano, the INGV National Institute for Geophysics and Vulcanology said on Twitter.</p>.<p>The nearby Vincenzo Bellini international airport in Catania closed at lunchtime Monday. Although it reopened after about two hours, it warned of delays.</p>.<p>Ash covered roads, balconies and the roofs of towns nearby, Italy's civil protection agency said.</p>.<p>The INGV said it had recorded a gradual rise in volcanic-seismic tremor -- induced by escaping gases -- which could be a sign Etna is heading towards another spectacular burst of fiery lava fountaining, known as paroxysmal activity.</p>.<p>At 3,324 metres (nearly 11,000 feet), Etna is the tallest active volcano in Europe and has erupted frequently in the past 500,000 years.</p>.<p><strong>Check out DH's latest videos:</strong></p>