An oil pipeline exploded near Nigeria's largest city as thieves tried to siphon oil from it and at least 15 people died in the fire, police and witnesses said Friday. "People were stealing fuel from the pipeline when it caught fire and exploded," said police spokesman Emmanuel Ighodalo of Thursday's blast in Amore, a village across a wide lagoon from Lagos, a city of 13 million people. Large plumes of smoke could still be seen billowing from the village Friday, and Ighodalo said "several" people died in the fire, although officials could not provide an exact death toll.