Vietnam deaths: Mystery deepens as three men remain trapped in Vietnam after deaths of Melbourne men Vincent Satuala Atulia and Andrew Colivas

Three Aussies are believed to be stuck in Vietnam following the mysterious deaths of two of their mates while holidaying together in south-east Asia. 

Vincent Satuala Atulia,24,and Andrew Colivas,25,from Melbourne,unexpectedly died in Vietnam on August 24. 

Three men they were travelling are understood to be receiving assistance from the Department of Foreign Affairs and Trade (DFAT) in the wake of the double tragedy. 

There is talk in Melbourne's underworld that the trio were reportedly detained by Vietnamese authorities after the deaths of Atulia and Colivas,the Herald Sun reported. 

A number of other people from Victoria were believed to have been associating with the group during the trip. 

DFAT confirmed to he publication that it continues to assist three men,but declined to comment on whether the pair are in custody. 

Daily Mail Australia has contacted DFAT for further comment.  

Police in Vietnam are still investigating the mysterious deaths of Atulia and Colivas and are probing whether the pair may have died from drug overdoses. 

Earlier,one source told Daily Mail Australia that Colivas and Atulia (pictured die),may have died after buying dodgy drugs while trying to secure ketamine

Officials from DFAT previously said consular assistance is being provided to the family of a man who died in Vietnam as well as three other Australians. 

Earlier,one source told Daily Mail Australia,the pair may have died after buying dodgy drugs while trying to secure ketamine.

'The news going around is they bought drugs and it was laced with a fentanyl dupe and [they] overdosed,' the source said.

Another source claimed there is a rumour circulating that the pair were shot in a drug deal gone wrong.

'In recent years Vince has been getting into steroids and ice,' the source said.

MelbourneAsia