He had posted on Twitter photographs of students allegedly shot during clashes in Jayapura and Wamena in Papua.
The Jakarta Post says Dandhy was accused of spreading information aimed at fueling hatred based on ethnicity, religio
His lawyer said it is a matter of freedom of expression in conveying his opinion on what is happening in Papua.
The paper reports the first photo posted said "Papuan university students in exodus from campuses across Indonesia opened a crisis center in [Cendrawasih University]. Authorities pick them up from the campus to Expo Waena. Riots. Some died."
The seond photo "High school students protest against racism by a teacher. [Security] apparatus handle them. The city is in chaos. Many are wounded by gunshots."
About 30 people have died in the violence in Wamena and Jayapura this week.