The girlfriend of an Australian surfer murdered in Mexico received a heart-rending voicemail shortly before he died, she has revealed.

Callum Robinson, 33, was traveling with his brother Jake and a US friend, Jack Carter Rhoad, when the trio were murdered near the town of Ensenada.

A Mexican man has been charged in their disappearance and reportedly has confessed.

Authorities believe the victims were killed while resisting a robbery.

On Instagram, Callum's girlfriend Emily Horwath shared the last voicemail he left her, which began with the words, "happy Tuesday! Good morning".

"It's 11:11 and I'm just thinking about you. Just wanted to drop you a quick message and say hello," Callum said. "Hope you're having a phenomenal start to your day."

"I'm sensing a big grin on your face for some reason today," he added. "I hope you're full of positivity and smiles."

Ms Horwath captioned the Instagram story with the words "I will play this on repeat".

The bodies of the Robinson brothers and Mr Rhoad were found six days after they vanished 27 April, each with a gunshot wound to the head, according to Mexican authorities.

A fourth body found in the same area had been there longer and is not believed to be connected to the case.

Read More