There are a total of three Bomb Rioters located on Bleake Island and they can be found in the following locations:

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Bomb Rioter 01

Map Co-ordinates: 1921, 2184

On a small bridging structure between two buildings in downtown Chinatown is a pressure plate we can step on. This is located along the street to the east of the bank of Gotham. The victim can be found on the street below, fly your Remote Controlled Batarang around the groups of enemies in the area until you find the enemy that is tagged red. Hit him with a Remote Electrical Charge to complete the challenge.

Bomb Rioter 02

Map Co-ordinates: 2030, 2378

This Bomb Rioter pressure plate is on the ledge of a building just to the northeast of Oracle’s Clock Tower. Fly your Remote Controlled Batarang around the group of enemies in the area on the street below under the parade floats until you find the enemy that is tagged red. Hit him with a Remote Electrical Charge to complete the challenge.

Bomb Rioter 03

Map Co-ordinates: 1650, 2218

On a rooftop at the location specified. Fly your Remote Controlled Batarang around the group of enemies in the area on the street below until you find the target. Hit him with a shot from the Remote Electrical Charge to complete the challenge.