Overview
- The incident occurred last week at Lord Williams's School in Thame, Oxfordshire.
- Headteacher Neil Dimbleby said three students stayed in hospital overnight after ingesting diluted copper sulphate taken from a laboratory.
- All three pupils have been discharged and are now at home, according to the school.
- Thames Valley Police were informed and are involved in the inquiry, though the force did not provide a public comment.
- Local reports say pupils may have added the bright-blue solution to water bottles after a science lesson, and an anonymous source described parental dissatisfaction, including one parent contacting police.