As Los Angeles firefighters continue to battle the January wildfires that have laid siege to southern California for almost a week, attention is beginning to turn to what exactly ignited the blazes.
The fires have so far killed at least 24 people, destroyed some 12,000 homes, scorched 40,000 acres of ground and forced the mass evacuation of residents, as emergency responders, including the National Guard, fight to bring the flames under control and restore order.
