A further two youths, both aged 16, have been arrested and charged with two arson attacks in Carterton on Sunday.
The arson charges come after the arrest of a 15-year-old male on Thursday, who has also been charged with deliberately setting fire to the same two buildings.
A new unoccupied two-unit block in Belvedere Rd, Carterton, was badly damaged around 9.30pm on Sunday. The Carterton Baptist Church was broken into and a small fire started in the kitchen around 11.20pm the same night.
The charges involving the three youths were not related to the Cockburn St, Masterton, arson also on Sunday, Masterton police Senior Sergeant Carolyn Watson said.
The two 16-year-olds will appear in Masterton Youth Court next week.