The man accused of fatally setting a Brisbane bus driver on fire was a mental health patient and Queensland's health minister Cameron Dick says a review will determine if he had received proper treatment.
Mr Dick has revealed Anthony O'Donohue, 48, who has been charged with murder over Friday's attack that killed Brisbane City Council driver Manmeet Alisher, had received public mental health services.
Mr Dick says privacy laws prevent him from saying when O'Donohue was last treated, or revealing any other details about his care.
But he says an independent review, led by forensic psychiatrist Professor Paul Mullen, will thoroughly assess the adequacy of that care.
Prof Mullen is due to report back to the government in eight weeks, and the minister has promised to release the findings as far as he's able under the law.
The external probe will run in parallel with an internal review by the Metro South Hospital and Health Service, which treated O'Donohue.
"It's important that there be an independent review of the delivery of services," Mr Dick told reporters.
He said there was "a very robust clinical and legal framework" for the treatment of mental health patients in Queensland, but the review would identify any deficiencies.
Mr Alisher, 29, was burnt to death behind the wheel when he stopped to pick up passengers at a Moorooka bus stop.
Police have said there's no obvious motive for the attack and have ruled out terrorism or racial factors.
Mr Alisher's brother Amit Alisher has arrived in Brisbane from India and hopes to fly home with his brother's body later this week before telling his frail parents of the heart-breaking news. At this stage they believe their son has been in an accident and is in a coma.
Indian leader Narendra Modi has phoned Prime Minister Malcolm Turnbull to express his shock and concern about Mr Alisher's death.
O'Donohue has been charged with murder and arson, and also 11 counts of attempted murder relating to other people who were on the council bus.
Passengers who witnessed the attack and were trapped on the burning bus before taxi driver Aguek Nyok kicked out a back door remain deeply traumatised.
Mr Dick said he was devastated for the Alisher family and has also paid tribute to the paramedics and others who responded to the incident.
