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Bomb disposal experts were called in today when a pupil took a large firework into a Maidstone primary school.
The team was drafted into South Park after the discovery was made at nearby South Borough Primary School.
Officers from the Royal Logistics Corps worked at the site, where police had enforced a small cordon.
Police said the "large live firework" was examined and removed from the scene.
Crews remained at the site until about 1.30pm as they worked to identify what was brought to the Stagshaw Close school.
The alarm was raised at just after 9am when the firework was discovered.
A school statement said: "Officers are currently at the school after a member of staff reported that a pupil had taken what is believed to be an old firework to school.
Video: Bomb squad called to South Borough School
"Although a small cordon is in place disruption has been kept to a minimum and lessons are continuing.
"Children are safely in other parts of the school while officers work. Some nearby recreational areas have been closed as a precaution."