Education authorities in Poland are investigating allegations that a primary school teacher taped children's mouths shut to silence them.

A suspicious mother secretly recorded the teacher's classes and in the recordings, published by TVN24, a woman is heard threatening that she will again put adhesive tape over a child's mouth. A child is heard pleading: "But it hurt."

The woman's voice also says "I will take your tapes off during breakfast", as children's voices are heard in the background.

Agnieszka Cichorek, the director of the village school in Szczodre, said she was not aware of the teacher's behaviour, and the teacher has since been fired.

Janina Jakubowska, a spokeswoman for the education authorities, said regional school inspectors are gathering facts in the case.

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