BEIRUT Lebanon 's prime minister accused Israel on Friday of rejecting a ceasefire after the Israeli military bombed Hezbollah's south Beirut stronghold for the first time this week. In Gaza, where Israel has been engaged in a major offensive in the north for nearly a month, a Hamas official said the Palestinian militant group had rejected a proposal for a short-term truce. United Nations chiefs called the situation in northern Gaza "apocalyptic" and warned that the entire population there was