A man from Apeldoorn was arrested on Thursday in connection with what police said is a ‘serious threat’ against the Deltion college in Zwolle.
Security round the college was stepped up on Thursday because police are taking the telephone threat very seriously, a spokesman said. No further details were given.
The main entrance to the school has since been closed off and pupils have to use a side entrance, where their bags are checked before they are allowed into the building, news agency ANP said.
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