Nigeria on Monday charged 10 people with treason and conspiring to incite the military to mutiny following last month’s nationwide demonstrations that saw thousands take to the streets to protest against a cost of living crisis.

The protests were met with a deadly crackdown by security forces and Amnesty International said at least 13 people were killed. Security forces denied using lethal force.

The 10 men were arraigned in the Abuja Federal High Court and entered a not guilty plea. They face the death penalty if convicted, human rights lawyer Inibehe Effiong said.