Protesters around the world have vowed to remember the girls abducted by the Nigerian militant Islamist group Boko Haram one year ago.

A procession is being held in Nigeria’s capital, Abuja, with 219 girls taking part to represent each missing girl.

UN Secretary-General Ban Ki-moon said the world must “never forget the kidnapped Chibok girls”.

The mass abduction sparked global outrage, with nations including the US and China vowing to help find them.

There have been reported sightings of the girls, but none has been found.