Every year, members of the Tengger tribe threw cattle and food into the crater of Mount Bromo. The Hindu festival is called Yadnya Kasada.
According to legend, the ritual dates back to the 15th century, when the Javanese princess and her Brahmin husband were unable to conceive.
The gods agreed to answer their prayer with 25 children, on condition that the youngest be given to the volcano. It is said that the 25th child jumped into the crater of his own accord, to secure the future of Tengger.
A Tenggerese, Wantoko, brought his own crops to throw into the volcano on Saturday.
“I brought these crops so that my fields would be fertile and I would have a good harvest,” he said.
According to AFP, local villagers who are not members of the tribe climbed the slope of the crater to try and grab some of the offerings before they were consumed.