According to news reports,
"Despite the 20,000 troops deployed in southern Lebanon, the United Nations admits that weapons smuggling from Syria continues unhindered. A German report finds UNIFIL does not patrol after dark. Hizbullah terrorists are free to roam at night without fear of being identified by the United Nations Interim Force in Lebanon (UNIFIL), according to a report by the German paper Der Spiegel.
Spanish UNIFIL official Richard Ortax admitted to the paper that no patrols are carried out at night “because of the danger involved.” (Read more)