Satellite images show devastation in Nigerian town of Baga

Amnesty International has released satellite images of the Nigerian town of Baga, showing the scale of destruction after last week's attack by Boko Haram.

620 buildings were damaged or completely destroyed by fire. Local officials said up to 2,000 people had died in the attack.

The Nigerian government has put the number of those killed at only about 150 people.

Will Ross reports from Lagos.