Fatalities caused by the eruption of Mount Merapi in Indonesia's Yogyakarta province rose to 28 people who were stung by hot ash, detikcom online news reported on Wednesday.

Data from the Sarjito Hospital in the province showed that four new victims are 70-90 percent burnt.

Mount Merapi last erupted in 2006, when sending an avalanche of blistering gases and rock fragments racing down its slopes, killing two people.

A similar eruption in 1994 killed 60, while 1,300 people died in an eruption in 1930.

Volcano eruption of Mount Merapi started on Tuesday afternoon in Central Java, Indonesia, and over 15,000 people fled their homes.

Heru Krisno, head of the Sardjito Hospital, said at a press conference that there are 14 people being treated due to burn.

"They are in a critical condition as 80 percent of their bodies were burned (by hot ash)," he said.

Mount Merapi, 2,968 meters high, erupted three times. The first eruption was at 17:02 p.m. Jakarta time (1002 GMT) on Tuesday.