Police have not identified anyone as a suspect in the death of drug convict Jone Vakarisi.
They say investigators have recorded statements from several people in relation to Vakarisi’s death.
Police add that, to protect the integrity of the investigation process, they will release details when there is a major development in the case.
Police on Monday classified his death as murder.
Vakarisi died in military custody last Thursday while 3 other associates were released after questioning.
Commander of the Republic of the Fiji Military Forces, Major General Ro Jone Kalouniwai has said that as part of a joint inquiry into recent security breaches, four individuals voluntarily presented themselves at Queen Elizabeth Barracks to assist with investigations.
He confirms that of those present, only Vakarisi experienced a medical crisis.
The Army Commander says in strict adherence to the Inquests Act 1967, the RFMF has immediately notified the relevant authorities and referred the matter to the Coroner's Office for an independent and formal inquiry.
He says a documentation suggests a continued intent by this criminal network to target state infrastructure, posing a credible threat to public safety.
They reiterate that any attempt to destabilize the nation or unlawfully access military assets will be met with firm, lawful, and proportionate action.
The public is reminded that providing material support to individuals engaged in these criminal activities is a serious offence under Fiji law.
According to the death certificate being circulated says Vakarisi died from severe head and chest injuries.
The report says the condition directly leading to his death is asphyxia.