Bomb disposal personnel were called to Hamilton Grammar School on Friday
Bomb disposal officers were called to a school in South Lanarkshire earlier after a pupil brought in an old grenade as part of a history project.
Police Scotland said Explosive Ordnance Disposal staff attended Hamilton Grammar School shortly after 09:00.
They quickly determined that the grenade was safe and non-viable.
South Lanarkshire Council said that the school had not been evacuated during the incident although the class did not go ahead as planned.
A council spokeswoman said: "As part of a history project a pupil brought to school an old military presentation piece, originally a grenade, belonging to their grandfather.
"Police were called who went to the school with bomb disposal experts.
"They quickly reassured everyone there was no danger posed by the presentation piece and no need to evacuate the school."
