At least 29 pupils and a teacher have been killed in a pre-dawn attack by suspected Islamists on a school in north-eastern Nigeria, reports say.
Eyewitnesses said some of the victims were burned alive in the attack, in Mamudo town, Yobe state.
Dozens of schools have been burned in attacks by Islamists since 2010.
Yobe is one of three states where President Goodluck Jonathan declared a state of emergency in May, sending thousands of troops to the area.
Will Ross of BBC reports