Oscar Pistorius faces two more firearm charges, unrelated to girlfriend's alleged murder

Oscar Pistorius faces further legal trouble as his March trial approaches. (Michael Steele/Getty Images)

Oscar Pistorius, a double-amputee Olympian who is already facing charges for the alleged murder of his girlfriend Reeva Steenkamp, was served with new indictment papers Wednesday containing two extra firearm charges.

The first is for allegedly recklessly shooting his own gun out of an open sunroof of a car last year. The second is for firing someone else's handgun at a restaurant, just weeks before Steenkamp's death. He could be charged with public endangerment and damage to property for both charges.

He was already facing two charges -- one for the murder of Steenkamp, and another for illegal possession of ammunition in his home. He will likely face all four charges at his trial, which starts in March.