Israeli forces expanded their offensive against Islamist militants deeper into the Gaza Strip on Sunday, triggering clashes in which 13 soldiers died and more than 60 people were killed in the shelling of a densely populated neighborhood of Gaza City, the army and local health officials said. Palestinian mourners carry the bodies of the three siblings of the Abu Musallam family, during their funeral in Beit Lahiya, northern Gaza Strip, Friday, July 18, 2014.