Israel's Prime Minister Benjamin Netanyahu attends the weekly cabinet meeting at his office in Jerusalem April 10, 2011. Israel and the Gaza Strip's Hamas rulers signalled on Sunday they were looking to end a flare-up in violence that began four days ago with a missile attack on an Israeli school bus and has claimed the lives of 19 Palestinians. Netanyahu said Israel would raise the stakes if cross-border attacks continued. REUTERS/Jim Hollander/Pool (JERUSALEM - Tags: POLITICS CIVIL UNREST)