U.S. Senate investigators say the former head of the U.N. oil-for-food program for Iraq may have netted more than $1 million through oil deals with Saddam Hussein's government.

A Senate panel has released Iraqi Oil Ministry documents that suggest program chief Benon Sevan was given the right to sell Iraqi oil contracts.

The panel began hearings Tuesday on allegations of corruption in the now-defunct United Nations-run program.

A U.N. commission headed by former U.S. Federal Reserve Chairman Paul Volcker is conducting a separate investigation into whether Mr. Sevan received money through the program.

The commission's preliminary report said Mr. Sevan solicited oil deals for a Panamanian company, an act the commission called a "conflict of interest."

Mr. Sevan has repeatedly denied any wrongdoing.

Some information for this report provided by AP and Reuters.