wing opposition to his Gaza withdrawal plan. Political sources said Sharon would review the operation again during Sunday's cabinet meeting, but was unlikely to call it off without guarantees that Hamas rocket attacks would cease. "If we pull out now, we cannot guarantee that the rocket attacks will stop. Hamas's activity has been weakened, but not entirely halted," Israel's Maariv newspaper quoted Sharon as telling security chiefs. Palestinians fired two Qassam rockets at Sderot on Thursday, hitting a house but causing no casualties, medics said. The second rocket landed in an open field. Hamas, an Islamic group sworn to Israel's destruction, vowed to continue firing rockets even after a Gaza pullout, calling them "resistance" to Israel's attacks on Palestinians. --More 2354 Local Time 2054 GMT