An inmate from Hawai'i died Wednesday night of injuries suffered in an attack at the federal prison at Victorville, Calif.

The Victorville Daily Press reported that Gregory Francis Ritter, 30, was attacked by several other inmates Monday afternoon.

San Bernardino County Fire Department officials transported Ritter to a local hospital.

Later that evening he was taken to Arrowhead Regional Medical Center in Colton to receive a higher level of care.

Ritter, who suffered unspecified injuries to his upper body, died Wednesday at 7:13 p.m. Pacific time.

The FBI is investigating the incident.

Ritter, of a Niu Street address in Waikiki, was arrested on March 9, 2008, for driving what appeared to be a stolen car, federal court records show.

The arresting officer took a black backpack and a fanny pack from Ritter. Upon obtaining search warrants, police found the bags contained a .45-caliber handgun, a black ski mask, 25 rounds of ammunition and a packet of crystal methamphetamine.

The case was turned over to federal prosecutors and Ritter was indicted in federal court on a charge of being a felon in possession of a firearm.

He pleaded guilty to the charge in April 2008. He was 29 years old at the time and had spent virtually all of the preceding decade behind bars, according to court records.

As of June 17, 2003, he had been arrested in connection with 51 criminal offenses and had accumulated 17 convictions, including those for robbery and burglary.

U.S. District Judge David Ezra in August sentenced Ritter to 33 months in prison, ordered that he undergo 500 hours of drug addiction treatment and recommended that he be placed in a federal prison that would allow him to undergo tattoo removal.

In March 2008, U.S. Attorney for Hawai'i Ed Kubo Jr. noted that Ritter's arrest was an indication of how successful the joint federal and county Project Safe Neighborhoods program was.

Kubo noted that Ritter was a career criminal with dozens of prior arrests and 17 convictions.

United States Penitentiary-Victorville is a maximum-security facility that opened in 2004.

The prison is on lockdown during the FBI's probe, meaning inmates cannot leave their cells and no visits are allowed.