Italian authorities on Wednesday, released a list of 28 passengers still missing after the Costa Concordia cruise ship that capsized off the coast of Italy Friday, including a Minnesota couple named Barbara and Gerald Heil.

The death toll has climbed to 11.

Since Monday, six bodies have been pulled out of the wreckage, but the names of those people have not been released. All the names below have not been confirmed dead, according to The Associated Press, which published the list Wednesday morning. Most are from Italy and Germany.

The ship, carrying 4,200 people, sank when it hit rocky waters outside Tuscanny. Cruise Captian Francesco Schettino has been placed under house arrest while authorities investigate the tragedy.

Friends of the Heils are planning a prayer service for the missing American retirees, ABC News reported Tuesday.

- Dayana Arlotti, Italy

- William M. Arlotti, Italy

- Elisabeth Bauer, Germany

- Michael M. Blemand, France

- Maria Dintrono, Italy

- Horst Galle, Germany

- Jeanne Gannard, France

- Christina Mathi Ganz, Germany

- Norbert Josef Ganz, Germany

- Gertrud Goergens, Germany

- Pierre Gregoire, France

- Gabriele Grube, Germany

- Barbara Heil, United States

- Gerald Heil, United States

- Egon Hoer, Germany

- Mylene Litzler, France

- Margarethe Neth, Germany

- Inge Schall, Germany

- Siglinde Stumpf, Germany

- Brunhild Werp, Germany

- Josef Werp, Germany

- Margrit Schroeter, Germany

- Maria Grazia Trecarichi, Italy

- Luisa Antonia Virzi, Italy

Cre

- Sandor Feher, Hungary

- Girolamo Giuseppe, Italy

- Russel Terence Rebello, India

- Erika Fani Soriamolina, Peru

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