A male youth was arrested yesterday afternoon after families in Mount Pleasant, Christchurch received threatening letters.
Police said the youth was charged with two counts of extortion in connection with writing and sending threatening letters in June.
He will appear in the Christchurch District Court on Thursday.
Police said the complainants have been advised and were relieved that the male responsible would be held to account for the stress he has caused to them and to the people living in the Mount Pleasant community.
In June, some parents at Mt Pleasant School had received letters demanding money and threatening harm to children.