Coast Guard did not indicate how long cleanup will take ; investigation ongoing . - The U.S. Navy said it is investigating the cause of a fire that broke out on board an aircraft carrier in San Diego Bay early Saturday. Coast Guard deployed 4,000 feet of boom , four 25-foot boats and other vessels for cleanup .
Coast Guard did not indicate how long cleanup will take ; investigation ongoing . No injuries reported , but a 50-block area was evacuated . Coast Guard deployed 4,000 feet of boom , four 25-foot boats and other vessels for cleanup .