Pistorius family lawyer Kenny Oldwage has said: "There is no doubt that Carl is innocent and the charge will be challenged in court. Carl deeply regrets the accident.
"Blood tests conducted by the police at the time proved that he had not been under the influence of alcohol."
More top news
Emergency services have declared a "major incident" in Leicester following reports of an explosion.
Parts of the UK will feel colder than the Arctic Circle in the coming week as bitter winds make it feel -15C in some places.