Imprisoned Paralympian Oscar Pistorius 'bruised' from inmate fight over phone use, officials say Prison authorities are investigating the apparent brawl.

JOHANNESBURG  -- Paralympic athlete and convicted murderer Oscar Pistorius was apparently bruised in a prison fight over a telephone, South African prison authorities said today.

No serious injuries resulted from his altercation with another inmate over the use of the prison phone, Department of Correctional Services spokesman Singabakho Nxumalo said.

“Pistorius wasn’t seriously injured. He was just bruised, although I haven’t received information about the exact location of the bruise,” Nxumalo said. “We do regard the incident in a serious light and will act once we have all the facts.”

Pistorius, a double-leg amputee known as the “Bladerunner” because of his prostheses, was first convicted of culpable homicide (manslaughter) in 2014 for shooting and killing his girlfriend, Reeva Steenkamp, on Valentine's Day 2013. The Supreme Court of Appeal of South Africa upgraded his conviction to murder in 2015 on appeal.

The Pretoria High Court sentenced him to six years’ imprisonment in July 2016, which the Supreme Court of Appeal increased to 13 years last month.

Pistorius, 31, has reportedly been on the phone quite a bit since then.

Nxumalo, the prison spokesman, told ABC News that an internal investigation — involving Pistorius, the other inmate, possible witnesses and guards — is underway.

“The outcome of the investigation would determine if any remedial action would be undertaken against any of the inmates involved,” Nxumalo said, stressing that any punishment is a long way off but could include forfeiting prison privileges such as visitation rights, phone calls, letters and Christmas concessions.