WASHINGTON -- Nearly half the members of a House panel in control of Pentagon spending are under scrutiny by ethics investigators in Congress, The Washington Post reported Friday, citing a leaked confidential House ethics committee report.

Investigations by two separate ethics offices include an examination of Rep. John Murtha, D-Pa.,chairman of the appropriations subcommittee on defense, and six other lawmakers and their relationships with an influential lobbying firm, the newspaper said.

The Post reported in its online edition that the document was disclosed on a publicly accessible computer network and made available to the newspaper by a source familiar with such networks.

The ethics committee is one of the most secretive panels in Congress, and its members and staff members sign oaths not to disclose any activities related to its past or present investigations, according to the newspaper.

The inquiry involves lawmakers who steered appropriations to clients of a now-defunct lobbying firm and received campaign contributions from the firm and its clients.

The names included three lawmakers previously identified in the inquiry: the chairman of the defense subcommittee, Murtha; and Reps. Peter Visclosky, D-Ind., and James Moran, D-Va.

The Post said others whose names were in the report included Reps. Norm Dicks, D-Wash., Marcy Kaptur, D-Ohio, C.W. Bill Young, R-Fla., and Todd Tiahrt, R-Kan.

The committee, however, has not announced an investigation of any of these lawmakers.

A committee statement said its security was breached through "peer to peer file sharing software" by a junior employee who was working from home. The staff member was fired.

The July report contains a summary of the committee's work at the time, but Lofgren said no inferences should be made about anyone whose name is mentioned.

The House ethics committee announced Thursday it is investigating two California Democratic lawmakers.

The committee said it is investigating whether Rep. Maxine Waters used her influence to help a bank in which her husband owned stock, and whether the couple benefited as a result. Separately, the panel is investigating whether Rep. Laura Richardson failed to disclose required information on her financial disclosure forms and received special treatment from a lender.

As the House was conducting scheduled votes Thursday, ethics chairwoman Rep. Zoe Lofgren, D-Calif., went to the microphone to announce that a confidential weekly report of the committee from July had leaked out in a case of "cyber-hacking."

The committee makes a public announcement when it begins an investigation of potential rule-breaking, which is conducted by an investigative subcommittee whose members also are made public.

However, the weekly reports include a summary of the committee's work at an earlier stage, when its members and staff scrutinize lawmakers to see whether an investigation is warranted.

Waters is the No. 3 Democrat on the House Financial Services Committee and chairwoman of its subcommittee on housing. She has been an influential voice in the committee's work to overhaul financial regulations.

Waters came under scrutiny after former Treasury Department officials said she helped arrange a meeting between regulators and executives at OneUnited Bank last year without mentioning her husband's financial ties to the institution.

Her husband, Sidney Williams, holds at least $250,000 in the bank's stock and previously had served on its board. Waters' spokesman, Michael Levin, said Williams was no longer on the board when the meeting was arranged.

Waters has said the National Bankers Association, a trade group, requested the meeting. She defended her role in assisting minority-owned banks in the midst of the nation's financial meltdown and dismissed suggestions she used her influence to steer government aid to the bank.

"I am confident that as the investigation moves forward the panel will discover that there are no facts to support allegations that I have acted improperly," Waters said in a statement.

The committee unanimously voted to establish an investigative subcommittee to gather evidence and determine whether Waters violated standards of conduct.

The committee said it would investigate "alleged communications and activities with, or on behalf of, the National Bankers Association or OneUnited Bank" and "the benefit, if any, Rep. Waters or her husband received as a result."

The committee also voted unanimously to investigate whether Richardson violated House rules, its Code of Conduct or the Ethics in Government Act by failing to disclose property, income and liabilities on her financial disclosure forms.

The investigation also will determine whether Richardson received an impermissible gift or preferential treatment from a lender, "relating to the foreclosure, recission of the foreclosure sale or loan modification agreement" for her Sacramento, Calif., property.

Richardson said she has been subjected to "premature judgments, speculation and baseless distractions that will finally be addressed in a fair, unbiased, bipartisan evaluation of the facts."

"Like 4.3 million Americans in the last year who faced financial problems because of a personal crisis like a divorce, death in the family, unexpected job and living changes and an erroneous property sale, all of which I have experienced in the span of slightly over a year, I have worked to resolve a personal financial situation," she said in a statement.

The committee ended an investigation of Rep. Sam Graves, R-Mo., and released a report finding no ethical violations. It investigated whether Graves used his position on the House Small Business Committee to invite a longtime friend and business partner of his wife to testify at a committee hearing on the federal regulation of biodiesel and ethanol production.

The Associated Press contributed to this report.