U.N. officials are calling it "one of the gravest incidents" of the two-week-old Gaza war. Some 30 civilians in Gaza City were killed, medical workers say, when Israeli gunners repeatedly shelled a house where civilians were holed up and then, it's alleged, failed to help the wounded.
The Israeli military says it is investigating and denies its soldiers targeted civilians.
A survivor of the shelling tells her story.
A warning to listeners: This story contains some graphic descriptions of violence.