A massive fire north of Christchurch was sparked by a firework being let off.
The blaze burned through 160ha of pine forest and scrub along a five kilometre stretch of beach from Pegasus to Woodend.
Police are speaking to two young people; one has been referred to Youth Aid. 130 people were evacuated from a beach holiday park as the fire threatened last night, gathering up what they could and leaving in the dark to spend the night away from the path of the fire.
Residents are beginning to return to their homes.
