NEW : `` Reasonable expectation of survivors has passed '' Coast Guard rear admiral says . CNN suspends search for missing in the Gulf of Mexico oil rig fire . Interviews with survivors indicate the 17 missing may have been in vicinity of explosion . The Coast Guard and the Minerals Management Service -- the agency that regulates the oil industry in federal waters -- are conducting an active search for casualties , she said . Oil slick measuring more than 5,200 square miles spreads from site of sunken rig , Coast Guard says .
NEW : `` Reasonable expectation of survivors has passed '' Coast Guard rear admiral says . CNN suspends search for missing in the Gulf of Mexico oil rig fire . Interviews with survivors indicate the 17 missing may have been in vicinity of explosion . Oil slick measuring more than 5,200 square miles spreads from site of sunken rig , Coast Guard says .