EDITORS PLEASE NOTE: CONTAINS GRAPHIC CONTENTbr br Blood spills across Gaza.br br At least 10 people including eight children are killed in an explosion at a refugee camp.br br Israel denies responsibility, saying it was a misfire by a rocket launched by Hamas militants.br br And in southern Israel, a mortar strike kills four people, and wounds many more.br br An unofficial truce for the holiday of Eid has collapsed.br br And Israeli Prime Minister Benjamin Netanyahu warns of a protracted campaign:br br (SOUNDBITE) (Hebrew) ISRAELI PRIME MINISTER BENJAMIN NETANYAHU, SAYING:br br "Stamina and determination are required in order to continue in the struggle against a murderous terrorist group that aspires to destroy us."br br Israeli tanks assemble at the border. Palestinian fighters slip into an Israel village. Flares light up Gaza's skyline.