Andrie Yunus, deputy coordinator of the KontraS rights group, sustained serious injuries to his face, an eye, hands and chest in the attack in Jakarta late on Thursday.
Andrie was riding a motorbike when he was approached by two men on a scooter, one of whom threw acid at him, according to KontraS coordinator Dimas Bagus Arya. Both attackers had their faces concealed.
Andrie, who had previously received threats for his activism, was rushed to hospital with burns to 24 per cent of his body, Dimas said.
“We view this acid attack as an attempt to silence critical voices in society,” he added.
Andrie has been a vocal critic of moves to increase the influence of the military in the Indonesian government and had just finished recording a podcast on the topic when he was attacked.
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