An 18-year-old boy from Bedfordshire was arrested on suspicion of multiple offences, including drug-related crimes at a school in Harpenden.
The teenager, from Kensworth, was arrested yesterday morning in connection with 12 thefts, possession of a non-bladed weapon (a hammer), possession of cannabis and being concerned in the supply of Class A and Class B drugs at a Harpenden school.
He has been released under investigation, pending further enquiries.
A police spokeswoman said: “We have been working closely with schools in Harpenden following concerns from them and from parents.
“We take all reports involving drugs seriously and they will be thoroughly investigated.”
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