Officials in northern port city see blasts in Lebanese capital as 'wake-up call,' urge government to speed up efforts to move dangerous oil, petrochemical industries away from bay

Odorless crystalline substance used as fertilizer has been the cause of numerous explosions over the decades; expert believes a small explosion may have ignited it in Beirut

Israeli explosives consultant shores up assumption that fireworks, easily ignited in hot weather, set off massive explosion of nearby store of fertilizer

Fellow Arab countries and others in region and outside it -- including Israel -- try to help Lebanon as Beirut port explosion causes humanitarian crisis

Unconfirmed picture appears to show workers welding door of warehouse filled with chemical; report says authorities warned of dangers for years

President's assertion contradicts Lebanese officials who called incident an accident; Pentagon has no comment

Hassan Diab says nearly 3,000 tonnes of agricultural fertilizer stored for years in a portside warehouse blew up in massive explosion heard in Cyprus, 150 miles away

With more than 3,000 injured and many Beirut medical centers overwhelmed and damaged, hospitals -- with long history of treating patients from hostile countries -- offer assistance