People attend the national remembrance service for victims of the mosque attacks, at Hagley Park in Christchurch, New Zealand March 29, 2019. Image Credit: Reuters

Police say the man accused of the Christchurch mosque attacks will face 50 murder charges and 39 attempted murder charges at his court appearance on Friday. Australian Brenton Harrison Tarrant had been charged with one count of murder after his arrest the day of the March 15 massacre.

Fifty people were killed in the two mosques and dozens of others were shot and wounded. Tarrant won't be required to enter a plea on Friday. The judge says the brief hearing will mainly be about Tarrant's legal representation. He has said he wants to represent himself.

Tarrant, 28, will appear via video link in the Christchurch court from a maximum-security prison in Auckland.

A note from the court this week said the appearance was likely to be brief and would "ascertain the defendant's position regarding legal representation" and other procedural matters.

Tarrant sacked a court-appointed lawyer after his first court appearance on March 16, raising fears he wanted to represent himself and attempt to use any trial as a propaganda platform.

The court said Tarrant would not be required to enter a plea during Friday's hearing.

The court has now barred media from filming or photographing the accused.

Police said further charges were being considered against Tarrant - a self-avowed white supremacist - but did not specify what they were.

They may relate to whether the court deems the attack a terrorist act, something Prime Minister Jacinda Ardern has repeatedly labelled the atrocity.

However, New Zealand's Terrorism Suppression Act, introduced after the 9/11 attacks, is little used and could complicate the prosecution.

Criminal charges, such as murder and attempted murder are easier to pursue, although prosecutors may want the accused tried as a terrorist to make the point that right-wing extremism is just as dangerous as its Islamic counterpart.

New Zealand's Corrections Department revealed last month that Tarrant was segregated from other prisoners and able to be observed constantly, either directly by staff via CCTV camera.

It said he had no access to television, radio or newspapers and no visitors.

Local media have reported that if convicted, he will likely face long-term isolation to prevent him being targeted by the largely Polynesian prison population over his white supremacist views.

24 victims still in hospital, 4 critical

New Zealand is in the process of tightening its gun laws after the attack and the government has also said it will review laws dealing with hate speech.

Ardern has called for action by social media giants after the alleged gunman livestreamed the attacks online.

The latest update from health authorities earlier this week said 24 people remained in hospital after the attacks, four of them critical, including a four-year-old girl.