GMAC Inc., a finance company that is 56% owned by the U.S., has hired Goldman Sachs Group Inc. to help with the sale of its unprofitable Residential Capital mortgage unit, according to a published report.

A story in Friday's New York Post cited a person familiar with the matter as saying it was becoming increasingly likely that Warren Buffett's Berkshire Hathaway Inc., which already owns some ResCap debt, might buy the mortgage lender.

A GMAC spokeswoman declined to comment.

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