— LAGOS (Reuters) - A massive explosion ripped through the cargo wing of Lagos airport in Nigeria's commercial capital on Thursday and witnesses said they feared there would be casualties. "The explosion tore through the building," a witness told Reuters. "The place is till on fire with smoke rising high. Ambulances have raced to the scene and a helicopter is flying overhead." There was no immediate explanation for the blast at the complex, which is usually crowded with cargo agents and clients. Copyright 2002 Reuters News Service. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.