A car bomb ripped through a Hezbollah stronghold in a crowded district of southern Beirut on Thursday, days after a blast in another part of the Lebanese capital killed a politician who opposed the Shiite political and militant group. Thursday’s bombing, which killed five people, drew warnings from officials across Lebanon’s divided political spectrum that the country was teetering on the edge of sectarian warfare, threatening the kind of tit-for-tat killings that marked the country’s 1975-90 civil war. Tensions and violence has surged in Lebanon as the country has been pulled into the civil war in neighboring Syria over the past three years. Three bombs have struck Beirut’s southern suburbs—knownbroadly as Dahyeh after the Arabic word for suburb—in the past year, apparently targeting Hezbollah and its supporters. Hezbollah has sent fighters to Syria to bolster regime troops in their fight against mostly Sunni rebels, a role that became public […]