Police are investigating a suspicious house fire in eastern Christchurch last night.
Firefighters were called to the blaze on the corner of Soberton and Warblington streets, Aranui, about 7.23pm.
A Fire Service spokesperson said the earthquake-damaged was vacant, and has been "extensively damaged" in the fire.
Four trucks and 12 firefighters were called to the property, which was "well-involved" in fire on arrival.
Police believe the fire was deliberately lit.