High levels of volcanic activity on Italy's Mount Etna caused flights at Sicily's Catania Airport to be disrupted on Monday.
Europe's most active volcano continues to spew large quantities of ash and glowing chunks of rock.
According to the National Institute of Geophysics and Volcanology (INGV), thick lava flows are pouring out of two vents at altitudes of 2,360 metres and 2,750 metres.
Due to potential risks to air traffic, all arrivals at the nearby Catania Airport have been suspended until 5 pm (1500 GMT) on Monday, the operator said.
Air traffic has been disrupted for several days in the middle of the peak holiday season.
Outbound flights are also affected, which is why holidaymakers have had to switch to the airport in the island's capital, Palermo, or take the train instead.
The highest alert level, red, is currently in force. This means that an eruption involving a significant ash plume is imminent or already under way.
Mount Etna, which stands over 3,300 metres high, erupts regularly and is constantly monitored.