Goldman Sachs Group Inc.'s Litton Loan Servicing LP on Friday joined the litany of servicers suspending foreclosures to review their processes.

The Houston servicer "has suspended foreclosure proceedings in certain cases while it completes a review of its procedures," a spokeswoman said.

Litton would not say how many cases are affected or in which states foreclosure proceedings are being halted.

Earlier Friday, Bank of America Corp. said it was extending its freeze on foreclosure sales to all 50 states. B of A had halted foreclosures in the 23 states where they are handled by courts last week, following similar moves by Ally Financial Inc.'s GMAC Mortgage and JPMorgan Chase & Co. The companies have slowed foreclosures after discovering problems with the way affidavits and other documents were executed.

PNC Financial Services Group Inc. is also reviewing its procedures.

Goldman purchased Litton in 2007 for about $468 million. According to National Mortgage News, Litton serviced $52.5 billion of loans as of June 30, making it the fifth-largest servicer of subprime mortgages.

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