Rocket fire on southern, central Israel; military says 550 projectiles fired from Gaza fell in Strip; confirmed hostages reaches 210; official says 'no humanitarian crisis in Gaza'

Girl, 8, and boys, 3 and 4, rushed to hospitals but doctors unable to save them; were reportedly walking to school in Shuafat refugee camp

Hamas deems latest clashes -- which left hundreds of Palestinians and 21 police officers wounded -- a 'massacre'; Turkey condemns 'heinous attacks' on Palestinians