July 27, 2014 9:39 A.M. (Updated: Aug. 14, 2014 8:08 A.M.) GAZA CITY (AFP) -- Israel is extending a lull in its devastating Gaza offensive for another 24 hours, officials said, but Hamas and other Palestinian factions warned no ceasefire was valid without the withdrawal of Israeli tanks.Israel's cabinet approved the UN request regarding a humanitarian ceasefire to run until midnight Sunday, an I