iPhone 4/4S self combust on an airplane

iPhone, belonging to one of the passengers during the flight of the Australian airline Regional Express caused many troubles. According to information from the airline, the device began to glow red and to emit dense smoke causing the aircraft landing at the airport in Sydney. Cabin staff was able to quickly quell incipient fire and fortunately none of the passengers was injured. It is not clear whether it’s an iPhone 4 or 4S but the cause of self-immolation may be due to a defect in the battery.