"Until when? Until when will this go on?" screams Um Ahmad Abu Hamada frantically after four of her family members, including her two sons, were killed in an Israeli strike on Gaza City. Rescuers confirmed several people have been killed in separate Israeli strikes across the central Gaza Strip where Israel's prime minister has vowed to intensify the pressure on militants even as demands grow for him to reach a deal that would free hostages. IMAGES AND SOUNDBITES