The Broadcasting Standards Authority's upheld one complaint about coverage of the mosque attacks.

It's released its decisions on four complaints.

Sky News New Zealand's use of extensive excerpts from the alleged gunman's livestream were found to have the potential to cause audiences significant distress.

But the BSA acknowledged SKY TV's limited editorial control over the foreign news channel.

It was ordered to pay $4,000 to the Crown.

The remaining complaints related to 1 News coverage, which featured a brief livestream excerpt of identifiable victims being taken to hospital.