 Detroit Mayor Kavanaugh asked Michigan Governor George Romney to send in the state police, but the 300 more officers couldn't keep the riot from spreading to a 100-block area. The National Guard was called in but didn't arrive until evening. By the end of the day, over 1,000 were arrested, but still the riot kept growing. Snipers fired at firemen and fire hoses were cut. Governor Romney asked President Lyndon Johnson to send in U.S. troops.