Millions of residents in northern Nigeria have been placed under 24-hour curfews amid nationwide protests against the high cost of living.
Governments in the states of Kano, Jigawa, Yobe and Katsina have ordered locals not to leave their homes - and therefore not attend protests - on Friday.
The authorities say the curfew is necessary because "hoodlums" have hijacked the protests in order to loot and vandalise properties.
There is a heavy security presence around the country with nine more "days of rage" scheduled by the movement's organisers.
