Prosecutors will not charge radio duo Kyle Sandilands and Jackie O with contempt of court over comments made during Erin Patterson's triple-murder trial.

The KIIS FM breakfast show hosts were referred to the Victorian Office of Public Prosecutions on June 16 after Sandilands made on-air comments about the case, including "just lock that b**** up".

At the time, Supreme Court Justice Christopher Beale encouraged commentators to "engage their brains before they open their mouths", warning they could land themselves in hot water.

But the Victorian Director of Public Prosecutions on Wednesday confirmed the radio duo would not be charged with contempt of court.

"It has been determined that in all the circumstances none of the incidents had a clear tendency ... to prejudice the fair trial of

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