By Daniel Burke, CNN Belief Blog Co-Editor
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(CNN) - Pope Francis reaffirmed the Catholic Church's opposition to gay marriage on Wednesday, but suggested in a newspaper interview that it could support some types of civil unions.

The Pope reiterated the church's longstanding teaching that "marriage is between a man and a woman." However, he said, "We have to look at different cases and evaluate them in their variety."

States, for instance, justify civil unions as a way to provide economic security to cohabitating couples, the Pope said in a wide-ranging interview published Wednesday in Corriere della Sera, an Italian daily. State-sanctioned unions are thus driven by the need to ensure rights like access to health care, Francis added.

A number of Catholic bishops have supported civil unions for same-sex couples as an alternative to marriage, including Pope Francis when he was Archbishop of Buenos Aires in 2010, according to reports in National Catholic Reporter and The New York Times.

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