What circumstances lead to Soheil’s death?

The internees stage their silent protest, standing at the fence with their fists in the air. A protestor with a bullhorn on the outside starts a chant to set them free, and Soheil runs toward the fence as if he would scale it, but he is electrocuted, and falls off the fence unmoving and nonresponsive. This leads to chaos in the camp, and Layla vomits in disgust for what she has seen.