BEIRUT, Lebanon (AP) - Warplanes bombed Beirut's southern suburbs again early Sunday, witnesses reported, after a day in which Israel tightened a noose around this reeling nation with the heaviest air strikes yet in the four-day-old conflict.The Israeli air force on Saturday hit strongholds of the Shiite Muslim guerrilla group Hezbollah, bombed central Beirut for the first time, and pounded seaports and a key bridge. Then, in Sunday's early morning darkness, a half-dozen thunderous explosions shook southern Beirut, where Hezbollah is headquartered and much of the intensifying air assault has been targeted since cross-border hostilities erupted Wednesday.
Israeli warplanes demolished the last bridge on the main Beirut-Damascus highway - over the Litani River, six miles from the Syrian border - trying to complete their seal on Lebanon.