Mohammad Siraj was racially abused during the Sydney Test, Cricket Australia on Wednesday confirmed that. 

Sean Carroll, CA's Head of Integrity and Security in a statement, "CA confirms that members of the Indian cricket team were subjected to racial abuse. CA's own investigation into the matter remains open, with CCTV footage, ticketing data, and interviews with spectators still being analyzed in an attempt to locate those responsibly.  

CA's investigation concluded that the spectators filmed and/or photographed by media in the Brewongle Stand concourse at the conclusion of the 86th over on day four of the Test did not engage in racist behavior. 

Cricket Australia has said police will take action against those involved in racist attacks.