Police have found four young people involved in an arson in Christchurch.

After initial discussions, a 15-year-old from the group has been identified as having lit the fire in Sol Square on July 14 and has been referred to Youth Aid. Police are still speaking with the remaining three young people.

The group were identified through inner-city CCTV footage and information from the public.

Police have thanked the public and the media for their help in identifying those involved.