Students and teachers have returned to Hunter Christian School at Mayfield after being evacuated earlier today when a hand grenade was brought in for ‘show and tell’ by an 11-year-old girl.

Mistaken as an antique money box by the student, the grenade was examined by specialist police and Defence Force officers before being safely removed from the school.

Evacuated residents in surrounding Bull and Kerr streets have also returned to their homes.

Police say all students are safe and accounted for.