The accused Christchurch mosque shooter asked police how many people he had killed after being arrested in the immediate aftermath of the March massacre.

Brenton Tarrant, 28, repeatedly asked officers 'how many did I kill?' and 'how many did it get', The Australian reported.

It was reported Tarrant was in a 'confused' and 'dazed' state when he was arrested, but after becoming lucid again he was only interested in the death toll.

The Christchurch mosque shooter repeatedly asked police how many people he had killed after being arrested in the immediate aftermath of the March massacre

The officers did not answer his questions but is believed they added them to their statements, which will from part of the prosecution's case against Tarrant.

The Australian white supremacist, 28, is currently remanded in a maximum-security jail in Auckland awaiting trial for the murder of 51 Muslim worshipers in the worst mass shooting in New Zealand's modern history.

On March 15, Tarrant allegedly stormed the Al Noor Mosque and Linwood Islamic Centre before shooting and killing more than 50 worshipers and injuring a further 49.

The entire massacre was also live streamed on social media.

Police initially filed a single representative murder charge against Tarrant but mistakenly named somebody who was still alive before later amending the charge.

It was reported Tarrant was in a 'confused' and 'dazed' state when he was arrested but after becoming lucid again he was only interested in the death toll form his terrorist attack

On March 15 Tarrant allegedly stormed the Al Noor Mosque and Linwood Islamic Centre before shooting and killing more than 50 worshiping Muslims and injuring a further 49

Tarrant has denied 51 charges of murder, 40 of attempted murder and one terrorism offence for his alleged role in the March 15 shootings.

The terror charge against him will be the first prosecution of its kind in New Zealand and some legal experts say it could potentially lead to a complex trial.

He remains in jail ahead of his trial, which has been scheduled for next May however there is some speculation the date could be changed.

During an August hearing, lawyers for accused gunman asked if the venue for the trial could be changed to Auckland, where Tarrant is being held at a maximum security prison, RNZ reported.

Judge Cameron Mander plans to hear arguments for the venue change during the next hearing on October 3.

The court heard that mental health assessments had found Tarrant was fit to stand trial.

'No issue arises regarding the defendant's fitness to plead, to instruct counsel, and to stand his trial. A fitness hearing is not required,' Judge Mander said.