Two primary school pupils have been disciplined after spiking a teacher's coffee with a "home-made concoction" thought to contain bathroom products.
Clapham Terrace Community Primary School in Leamington Spa, Warwickshire, declined to say what punishment had been given to the boys involved in the incident.
The teacher, named in reports as Emma Place, is believed to have been warned not to drink the doctored flask of coffee by other pupils.
The Sun reported that the incident, involving two boys aged 10, happened last Tuesday, a day after a teacher was stabbed to death at a school in Leeds.
In a statement confirming that disciplinary action had been taken, Clapham Terrace's chair of governors, Philip Robbins, said the teacher involved did not wish to press criminal charges.
Mr Robbins said: "During the first week of the summer term, two of our older pupils added a home-made concoction, believed to be a mixture of bathroom products, to a teacher's drink on her desk in the classroom.
"The teacher was alerted to this and did not drink her drink.
"With the cooperation of their parents, the two pupils concerned were removed from their normal lessons and were disciplined by the school, in a manner consistent with the school's normal pastoral policy.
"Pupils will receive ongoing guidance and counselling within school."
Mr Robbins said Warwickshire Police have been informed of the incident and had liaised with the headteacher.
But he added: "Neither the teacher concerned nor the school intends to press charges.
"Clapham Terrace School is proud of its reputation as a caring school where pupils' behaviour and the school's pastoral care are of a very high standard.
"Our main concern, following this incident, is to protect the best interests of our children and their families, and to support the teacher concerned, and other members of staff so that the school can put this incident behind it and continue with its normal business."
Warwickshire Police said officers had been called to a school in Leamington Spa following concern for the safety of a person.
Advice and guidance had been provided by officers to children at the school, which had determined that the "isolated incident" could be dealt with by staff, a police spokesman said.