A fed-up judge in the looming trial of the accused killers of Perth brothers Callum and Jake Robinson has threatened to fine defence lawyers if the case is delayed again.

Judge Oscar Padilla was visibly frustrated in granting another extension in a court in the Baja California beach city of Ensenada in Mexico , with lawyers posing possible plea deals.

He told them it would be the last delay in the case and warned they would be fined if they were not prepared for the next hearing, set for November 13.

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Jesus Gerardo, Irineo Francisco and Angel Jesus face charges including aggravated homicide, aggravated robbery, violent robbery and grand theft auto linked to the deaths of the Robinson brothers and their American companion Carter Rhoad.

A fourth suspect, Ari Gisel, is not accused of murder but is facing charges related to inciting violent robbery.

It was her lawyer who asked for the delay, arguing they needed more time to discuss sentencing options with the prosecution.

None of the four accused have entered pleas.

Judge Padilla again showed his frustration when prosecutors could not agree on the facts of the case.

He warned them that he expected better clarity at the next hearing.

According to the ABC, court documents presented during proceedings highlighted links between some of the accused and the Sinaloa drug cartel.

The organisation rules with fear and was once headed by cartel boss El Chapo.

Gerardo and Francisco have been moved to a maximum-security facility amid rising concern over their alleged ties to organised crime.

Callum, 32, and Jake, 31, were on surfing holiday and had been camping in a remote part of northern Mexico with their American friend Mr Rhoad, 30, when they were each shot in the head in April 2024.

Their bodies were then callously dumped in a 15m well in Baja California. A fourth, unrelated body was also found in the same location.