A group of U.S. nonprofit housing advocates has filed a discrimination complaint against Wells Fargo, accusing the nation's largest mortgage lender of failing to maintain and market foreclosed properties in black and Hispanic neighborhoods.

The National Fair Housing Alliance on Tuesday filed the complaint against San Francisco-based Wells Fargo and Co. and Wells Fargo Bank with the U.S. Department of Housing and Urban Development.

The federal Fair Housing Act requires banks, investors, servicers and other parties to maintain and market homes without regard to race or ethnicity.

Wells Fargo declined to comment, saying officials at the bank have yet to see the complaint.

(Copyright 2012 by The Associated Press. All Rights Reserved.)