The Aussie radio personality, who was dumped by sponsors of his 2DayFM after he launched an on-air attack on journalist Alison Stephenson last year, could be reprimanded after a number of listeners complained about him.
A spokesman for the Australian Communications and Media Authority (ACMA) told The Age: "We are investigating complaints about Kyle Sandilands's remarks on radio on November 22, 2011.
"The results of that investigation will be made available in due course."
In his tirade against Stephenson, Sandilands called her a "fat slag", a "little troll" and a "piece of s**t" and threatened to "hunt her down".
A petition on Change.org called for Sandilands's sponsors to stop supporting him, and soon after, advertisers including Telstra, Fantastic Furniture, Vodafone and Jenny Craig cancelled their contracts with the radio station.
After the incident, Sandilands said to Stephenson on air: "If you took a personal offence to it, Ali, I'm sorry, but maybe you should think again before you start going [against] different people.
"If they say I can dish it out but I can't take it, I never ever dish it out first. I always retaliate due to someone else's crazy, outrageous allegations."
He later released a statement saying: "I took my remarks too far and for that - and the offence caused to Alison Stephenson and those exposed to my comments - I sincerely apologise.
"I regret the impact this has had on our clients and our hard-working staff. I regret that so many had to bear the brunt of my actions."
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