‘What was their crime?’: BBC visits Iran school where strike killed 120 children

This report contains distressing descriptions of the deaths of children.

Amaineh Nademi walks carefully through what is left of her old school. Chunks of broken concrete hang precariously from the damaged upper floor. A few classrooms are still standing, their brightly coloured walls decorated with painted balloons and flowers.

The 33-year-old teacher knows exactly what was where – the girls’ classrooms on the upper floor, the boys’ classrooms below, the headteacher’s office, the prayer room.

Rubble is all that remains of her classroom, where she