Hezbollah guerrillas battled Israeli troops trying to take over a key southern Lebanese stronghold on Wednesday, killing as many as 12 Israeli soldiers, Arab media reported. Lebanese officials also confirmed that four U.N. observers were killed when an Israeli airstrike struck their post the night before. The fighting came a day after Israeli Defense Minister Amir Peretz said Israel plans to maintain a security zone in the south until either a multinational force is deployed or Hezbollah is pushed back in a cease-fire agreement that also cuts off the supply of its weapons. Full Story