The nonprofit AIDS Healthcare Foundation has called for a federal investigation of L.A. Mayor Richard Riordan's administration of the Housing Opportunities for People With AIDS program.

The federally-funded program sits with $13 million, or 130 percent of its annual budget, unspent, and the city's own research finds nearly one-third of people with AIDS in L.A. are homeless, the group charges.

The money comes from a $10 million per year grant from the U.S. Department of Housing and Urban Development to provide housing for people with AIDS in Los Angeles. A report from the city controller's office shows the city has collected $1 million a year from the fund for administration costs, but has not allocated any of the remaining money to programs for the homeless, the AHF claims.

Federal regulations usually require such funds to be returned if not put to use as originally designated.

In addition to a federal investigation of the fund's administration, the AHF has asked the program be taken out of the city's housing department and that the city government adopt an "AIDS Housing Bill of Rights."

There was no immediate response to the charges from the mayor's office.