A powerful explosion has rocked a stronghold of the Lebanese militant Hezbollah group in a southern suburb of the capital Beirut, AP reported. Eyewitnesses said the blast shook the area and thick black smoke was seen rising. It was not immediately clear what caused Thursday's explosion. Lebanese media reported it took place in the Rweiss district, a heavily Shiite district that is one of Hezbollah's bastions of support. Last month, a car bomb exploded in another south Beirut suburb, wounding more than 50 people. The violence raises the specter of Lebanon being pulled into the increasingly sectarian civil war raging next door in Syria.
