The U.S.-led coalition fighting ISIS may have committed war crimes as its airstrikes rained down on civilians trapped by the brutal fighting in the Syrian city of Raqqa last year, a new report claims. According to an investigation by Amnesty International, American, British and French strikes on the city from June to October 2017 "decimated extended families and neighborhoods" as the coalition embarked on a "war of annihilation." Amnesty [claimed] its investigation provided "prima facie evidence that several coalition attacks that killed and injured civilians violated international humanitarian law." After heavy fighting, surviving ISIS fighters were allowed to leave the city in October 2017. The U.S., British and French militaries claimed they did everything possible to minimize the risk of collateral damage during the operation, but Amnesty says hundreds died and thousands more were injured during the assault. The U.S. said it fired more than 30,000 artillery rounds during the five-month operation, and American forces were responsible for 90 percent of the airstrikes. The organization interviewed 112 civilian residents of Raqqa and visited the sites of 42 air, artillery and mortar strikes. The report focused on four cases in particular, which Amnesty said amounted to war crimes. In all cases "witnesses reported that there were no fighters in the vicinity at the time of the attacks," Amnesty said. "Such attacks could be either direct attacks on civilians or civilian objects or indiscriminate attacks."