Italian rescue workers were searching for nearly 40 people still missing early on Sunday, more than a day after Costa Concordia, a cruise ship with more than 4,000 on board, capsized off Italy's west coast. Costa Concordia ship wreck (photo credit: REUTERS/Stringer) Search and rescue begins (photo credit: REUTERS/ Remo Casilli ) Costa Concordia captain arrested (photo credit: REUTERS/Enzo Russo) A South Korean man is rescued (photo credit: REUTERS/Remo Casilli ) Rescue workers help survivors (photo credit: REUTERS/Stringer) Italian Coast Guard personnel recover the black box (photo credit: REUTERS/ Remo Casilli) RELATED:3 die after huge Italian cruise ship runs aground7 Israelis rescued after Italian ship runs agroundJust after dawn on Sunday, rescue workers made voice contact with another person trapped in the Costa Concordia. "We are doing the impossible to reach this person," Coast Guard spokesman Lucinao Nicastro told Italian television.