Investigations have been opened into two fires at an intermediate school in Christchurch, Fire and Emergency has confirmed.
The overnight fires were minor but investigators say the blazes were suspicious.
Fire crews were called to Wairarapa Cobham Intermediate in Burnside at 2.30am and again at 5.30am.
Wairarapa Cobham is in the final stages of a rebuild on Ilam Rd, with the last of construction set to be completed late this year.