Suspected white supremacist Brenton Tarrant is expected to enter pleas, and will face a new terrorism charge, when he appears in court on Friday over the mass shooting at two mosques in Christchurch.

In an attack on March 15 that was broadcast live on Facebook, a lone gunman armed with semi-automatic weapons targeted Muslims attending Friday prayers in Christchurch, killing 51 worshippers and wounding dozens of people.

Tarrant already faces 50 counts of murder for the attack and when he appears in the Christchurch High Court on Friday will be charged under a terrorist act, the first time such a charge has been brought in New Zealand.

Read more: Reuters