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Police were at the scene of a reported assault outside a secondary school in Broadstairs.
Officers were called to outside Charles Dickens school in Broadstairs Road shortly before 3pm.
There are comments on social media that a weapon was used, but this has not been confirmed.
A police spokesman said: "No injuries have been reported and enquiries into the circumstances are ongoing."
The school was contacted, but did not comment.
An email from executive headteacher Ms Cardus to parents says: "The police attended this incident and no-one was hurt.
"This all happened before the end of the school day and no Charles Dickens students were involved.
"Please can you discuss with your child the requirement to go straight home, safely from school, rather than waiting around in large groups, outside of school, for length periods which only makes any situation worse.
"We thank you for your support with this matter."