Israel bombed central Beirut in the early hours of Thursday, killing at least six people, after its forces suffered their deadliest day on the Lebanese front in a year of clashes against the Hezbollah militant group. It was the second airstrike within the Lebanese capital’s city limits since border hostilities began a year ago. Israel claimed it conducted a “precise” airstrike on Beirut. Reuters witnesses reported hearing a massive blast, and a security source said it targeted a building in the Bachoura neighbourhood, close to downtown, the nearest Israeli strikes have come to Lebanon’s seat o…