A fire in a crowded area of Nigeria\'s main city of Lagos believed to be storing fireworks on Wednesday spread to at least nine buildings and 30 people had been treated for injuries, a rescue worker said. \"We have treated up to 30 people so far,\" Red Cross worker Nicolas Adesile told AFP at the scene, adding there had not been any reports of deaths. An AFP journalist reported at least nine buildings on fire following an explosion at a shop believed to be storing fireworks.