Dark, searing clouds rolling down the mountain left apocalyptic scenes of ash-covered bodies scattered by a roadside in Sukameriah village, just 2.7 kilometres (1.7 miles) from the volcano's crater, an AFP witness who helped with the evacuation said.
Officials fear there could be more fatalities from today's eruptions, but due to the high potential of lethal heat clouds spewing from the mountain, a search and rescue mission has been grounded, officials said.
All 14 bodies have been identified. Four of them were high school students on a sightseeing trip to the volcano on the western island of Sumatra, he added.
"The bodies were in a state where, even though their skin did not peel, their faces were swollen and the tongues were sticking out," an AFP reporter on the ground said.
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Three other people -- a father and his son who wanted to pay respects at the graves of their relatives, and a man who came to the village to check his long-abandoned house -- were also trapped and injured by the deadly clouds, Karo district official Johnson Tarigan told AFP.
Thirty thousand people have been evacuated from the area since the volcano started erupting in September.
But some residents had returned home yesterday following advice from the Center for Volcanology and Geological Hazard Mitigation that houses outside the five-kilometre radius from the mountain were safe.
The volcano erupted again today morning, sending hot rocks and ash up 2,000 metres (16,00 feet) into the air, blanketing the surrounding countryside with grey dust, said volcanologist Kristianto, who like many Indonesians goes by one name.
Sukameriah village is located in the red zone, where human activities are strictly banned, but locals often trespassed the restricted area to check on their houses and belongings as well as their crops, officials said.