Alleged Christchurch gunman Brenton Tarrant remanded in custody after court appearance

One of the men accused of taking part in Friday's terrorist attack in Christchurch has been remanded in custody after appearing in court.

Brenton Harrison Tarrant, a 28-year-old Australian citizen, appeared in Christchurch District Court on Saturday morning charged with murder of one victim, who cannot be named.

Police say more charges are likely to be laid.

Tarrant appeared handcuffed in white prison clothes and flanked by two police officers.

He was remanded in custody without a plea and will appear again on April 5.

He was one of three people arrested in relation to the attacks after Friday's attacks at two mosques - one near Hagley Park and the other on Linwood Ave.

No application for name suppression was made, but his face must be pixelated.

Only accredited media was allowed inside the court at the time, leaving crowds of people waiting outside. Armed police were also present.

Forty-nine people were killed and dozens more, including children, were injured in the attacks.