Steve Smith's captaincy on the line as Cricket Australia launches probe in ball-tampering case

Cameron Bancroft has admitted that he tried to change the condition of the ball using an object on the third day of the Cape Town Test.

"I had discussions with the match officials, I've been charged with attempting to change the condition of the ball," Bancroft said after the end of day's play.

Bancroft has been charged by the International Cricket Council (ICC).

Australia skipper Steve Smith it was a deliberate plan from the "leadership group" of the side, but added he would not step down as captain.

"The leadership group knew about it, we spoke about it at lunch," Smith told a news conference.