Details are emerging about U.S.-led coalition airstrikes that are believed to have killed over 200 people in a single day in Iraq. The U.S.-led coalition has admitted launching airstrikes on March 17 targeting a crowded neighborhood in Mosul. They are among the deadliest U.S. airstrikes in the region since the U.S. invasion of Iraq in 2003. According to some reports, one of these strikes destroyed houses where hundreds of people were taking refuge amid the city’s heavy fighting. Up to 80 civilians, including women and children, may have died in one house’s basement alone. This bombing is just one of an onslaught of U.S.-led coalition airstrikes in Iraq and Syria that has killed as many as 1,000 civilians in March alone, according to the journalistic project Airwars.