Four Indonesian soldiers found guilty of an acid attack that left an activist blind in one eye were sentenced on Wednesday to up to three years in prison by a military court, with a judge calling their actions “arrogant”.

The four, all members of the military’s Strategic Intelligence Agency (BAIS), were found guilty of premeditated assault for the attack in March that left Andrie Yunus, 27, blind in one eye.

They were arrested shortly after the attack, and BAIS head Yudi Abrimantyo stepped down in what officials said was a “form of responsibility”.

But critics say those who planned the crime have not been identified and likely never will be.

Soldiers Edi Sudarko, 45; Budi Hariyanto Widhi Cahyono, 43; Nandala Dwi Prasetya, 40; and Sami Lakka, 41, were each sentenced to between one and a half and three years in prison.