NEW YORK - Fitch Investors Service Inc. has placed Barclays Bank PLC's AA long-term rating for structured transactions under review for a possible downgrade, the New York-based rating agency announced.

Structured transactions include letters of credit and liquidity facilities for asset-backed commercial paper programs.

Fitch said it put Barclays under review after estimating that the bank will continue to suffer from problem loans in nearly all categories.

"The burden of addressing loan quality problems may limit the bank's competitive position and responsiveness to an economic upturn." Fitch said in a statement.

London-based Barclays last week reported a $1.05 billion increase in possible problem loans and large charges against U.S. assets for the first half of this year.

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