Dozens of pupils were left with burns after "toxic" ash crosses were daubed on to their foreheads for Ash Wednesday at a Catholic school.
First aiders had to treat students and staff at St Augustine's High School in Redditch, Worcestershire, after they reported feeling a burning sensation caused by the ash smudged on their temples by a priest and two sixth-formers at a Lent assembly on Wednesday.
The school said it was dismayed by the incident, which affected 73 students, 16 teachers and the chairman of the governors, all of whom were advised to seek further medical attention.
At least two children were understood to have visited a hospital after the assembly.
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