Israeli troops killed hundreds of unarmed civilian adults and children, broke laws and committed war crimes during their winter offensive in Gaza, Amnesty International said in a scathing report released Thursday. The human rights group also pointed a finger at Hamas and other Palestinian militant organizations in its 117-page report. Hamas and other Palestinian groups committed war crimes by firing hundreds of rockets into southern Israel, killing three Israeli civilians, injuring scores and driving thousands from their homes, according to the report