Jurist Richard Goldstone, whose report to the United Nations accused Israel of war crimes, challenged United States President Barack Obama on Thursday over charges of bias. Obama's administration expressed concern that the report was both biased against Israel and flawed.

"I have yet to hear from the Obama administration what the flaws in the report that they have identified are. I would be happy to respond to them,” Goldstone told the pan-Arab news network Al Jazeera.