From the story here on Christmas Eve:
"We will do everything we can to prevent civilian casualties," said Operation Inherent Resolve spokesman Army Col. Steve Warren on Wednesday. ... Donatella Rovera, senior crisis response adviser at Amnesty International, said the leaflet drops actually started last week, but it has been difficult for people to leave. ... The Obama administration has come under fire from critics for adhering to restrictive rules of engagement and trying to avoid any civilian casualties in the fight against ISIS. Some say the rules are allowing ISIS fighters to escape. ... A U.S. defense official said the current U.S. rules of engagement for airstrikes, which are more restrictive than what the law of war requires, would remain the same as Iraqi forces push into Ramadi. Other coalition members — such as France — adhere to looser rules of engagement, however, and it's not clear who will be doing the striking in Ramadi.