Cricket chiefs are investigating claims India players received racist abuse from crowd members on day three of the third Test against Australia, while six people were ejected on day four.
India team staff reported alleged racist abuse against bowlers Jasprit Bumrah and Mohammed Siraj on Saturday.
In a further incident on Sunday, play was halted for 10 minutes after Siraj told the umpires of more alleged abuse.
Six spectators were then removed from the Sydney Cricket Ground.
Cricket Australia (CA) said in a statement that it “reaffirmed its zero-tolerance policy towards discriminatory behaviour in all forms” following the alleged racist abuse on Saturday.
CA’s head of integrity and security Sean Carroll said: “If you engage in racist abuse, you are not welcome in Australian cricket.
“CA is awaiting the outcome of the International Cricket Council’s investigation into the matter reported at the SCG on Saturday.
“Once those responsible are identified, CA will take the strongest measures possible under our Anti-Harassment code, including lengthy bans, further sanctions and referral to New South Wales police.
“As series hosts, we unreservedly apologise to our friends in the Indian cricket team and assure them we will prosecute the matter to its fullest extent.”
On Sunday, Siraj walked in from fine leg shortly before the tea break to speak to team-mates and umpires Paul Reiffel and Paul Wilson before pointing to a section of the crowd.
Police subsequently removed six spectators from the stadium, although it is not yet clear what had been said to Siraj.
Indian team management spoke to CA chief executive Nick Hockley and Carroll after the close of play on day three.
A group of India players, including captain Ajinkya Rahane, also spoke to the umpires.
Members of the India team staff talked to Bumrah while he was fielding on the boundary towards the end of the final session.
Bumrah and Siraj were also seen talking to officials from Cricket Australia, the International Cricket Council and stadium security.
The crowd has been limited to 10,000 fans per day because of social distancing measures at the SCG, which has a maximum capacity of 48,000.
India closed day four on 98-2, requiring 309 more runs to win after Australia declared on 312-6, setting the tourists an unlikely 407 for victory.
The four-match series is level at 1-1.