volcanic

Beneath the watchtower at UNDOF’s Camp Ziouani base, the Israeli fence snakes towards a line of volcanic mountains; a Syrian flag flutters in the trees beyond the post, marking the other side of the separation zone.

Australia’s Bureau of Meteorology has also warned that the volcanic ash might drift to parts of the country's north on Wednesday.

Past volcanic eruptions have disrupted aviation.

Activities in Indonesia have also been affected by the volcanic ash.

Video footage shared with BBC News by eyewitnesses shows people covered in volcanic ash, rock showers and homes ablaze, as well as the scorched aftermath of the disruption.