Well, it's the top news story on CBC right now, going by their little widget that shows the five most popular. Per the article, the warehouses were used to store explosives, so it might be unintentional and not a bombing at all; on the other hand, the article notes that Israel and Hezbollah skirmished last week, so I guess it could be a reprisal.
@khird I doubt an intentional strike would involve having a building smoldering prior to the explosion, you're likely right.