BBC News
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image captionThe remains of desks are all that is left from the straw-hut classrooms
At least 20 children have died after they became trapped in a fire at a school in Niger's capital, Niamey.
It started late on Tuesday afternoon when the children were in lessons, many in straw-hut classrooms.
The flames blocked the school gate, so most pupils had to escape over a wall, said a teacher's union official quoted by Reuters.
Most of those who did not manage to escape were attending the school's nursery, officials say.
The government-run junior and pre-school in the Pays Bas district of the city had a mixture of brick and straw-hut classrooms, BBC Hausa's Tchima Illa Issoufou reports from Niamey.