An arrest warrant was issued for former NFL defensive back Darren Sharper and an acquaintance after New Orleans authorities expanded an investigation to include the alleged rapes of two women there and nine rapes in five states.

The 38-year-old Sharper was previously being investigated one alleged rape in New Orleans last September before police confimed an additional alleged victim on Thursday.

Sharper and Erik Nunez, 26, each face two counts of aggravated rape in New Orleans.

"Last week, investigators learned that not one, but two women were allegedly sexually assaulted by Sharper in the same apartment the night of September 23rd," New Orleans police said in a statement. "New information uncovered also indicates that Nunez also allegedly raped both women that night at the same location."

Sharper, who was suspended by the NFL Network from his analyst job, pleaded not guilty last week in Los Angeles to charges that he raped two women there. He also is now suspected by authorities of allegedly raping women in Arizona, Nevada and Florida.

The only formal charges against Sharper so far are in California. He faces a preliminary hearing there in April.

A judge raised Sharper's bail last week from $200,000 to $1 million and ordered him not to leave Los Angeles County or go to nightclubs.

Sharper's attorney, Leonard Levine, contends that all of the acts were consensual, saying the women "voluntarily ingested alcohol and drugs in many cases."

If convicted in California, Sharper could face up to 30 years in prison. In Louisiana, aggravated rape is punishable by life in prison without parole.

The Los Angeles felonies relate to incidents in October 2013 and January. Sharper met the women at a nightclub in West Hollywood and invited them to a party but stopped at his hotel room, where the crimes allegedly took place, according to prosecutors.

Sharper, a six-time All-Pro, played for the Green Bay Packers, Minnesota Vikings and New Orleans Saints from 1997 to 2010.