ROUGH CUT - NO REPORTER NARRATION<br/> <br />A 12-hour humanitarian truce went into effect on Saturday after Israel and Palestinian militant groups in the Gaza Strip agreed to a U.N. request for a pause in fighting, and efforts to secure a long-term cease-fire moved ahead.<br/> <br />Israel's military said it would hold fire starting at 8 a.m. (0500 GMT) but would pursue its search for tunnels used by militants.<br/> <br />A spokesman for the Islamist group Hamas, which is dominant in the Gaza Strip, said all Palestinian factions would abide by the brief truce.<br/> <br />Fighting had continued overnight as U.S. Secretary of State John Kerry, on a visit to the region, spearheaded international efforts to end 19 days of conflict.<br/> <br />Gaza officials said five people were killed in Israeli air strikes, bringing the Palestinian death toll to 865, most of them civilians.<br/> <br />Earlier, militants fired a barrage of rockets out of Gaza, triggering sirens across much of southern and central Israel.<br/> <br />No in
