WASHINGTON (AP) - President Barack Obama says Iraq's government must make a sincere effort to address sectarian differences, or else U.S. military help won't succeed in curbing the insurgency there.
He says, quote, "We can't do it for them."
Obama says the U.S. won't send troops back into Iraq. But he says he's asked his national security team to prepare a range of other options. He says he'll review those options in the coming days.
Obama says the risk posed by terrorists in Iraq could eventually pose a threat to U.S. interests, too.
A fast-moving insurgency in Iraq has taken over key cities, raising fears Iraq is slipping back into sectarian chaos following the U.S. withdrawal in 2011.
Obama spoke just before departing the White House en route to North Dakota.
Meanwhile, the U.N. human rights chief is warning of "murder of all kinds" and other war crimes in the fast-deteriorating Iraqi war zone, where her office says the number of those killed in recent days may run into the hundreds and the number of wounded could approach 1,000.
U.N. High Commissioner for Human Rights Navi Pillay says her office has received reports that Iraqi army soldiers as well as 17 civilians in a single street in Mosul had been rounded up and killed by militants.
Pillay said in a statement Friday that her office also is hearing of summary executions and extrajudicial killings as fighters from the al-Qaida-inspired Islamic State of Iraq and the Levant overran a succession of major Iraqi towns and cities this week.