NEW YORK, April 28 (Reuters) - U.S. officials are coordinating urgent talks to rescue First Republic Bank (FRC.N) as private-sector efforts led by the bank's advisers have yet to reach a deal, according to three sources familiar with the situation. It is unclear whether the U.S. government is considering participating in a private-sector rescue of First Republic. The Treasury Department declined to comment; the FDIC and Federal Reserve did not immediately respond to emailed requests for comment after hours. U.S. officials view a private-sector deal as preferable to First Republic falling into FDIC receivership, two of the sources said. First Republic shares have lost 95% of their value since the regional banking crisis started on March 8.

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