A seafarer has been killed by an exploding gas cylinder on a Princess cruiseship in New Zealand.

The New Zealand Herald reported that the 114,000-gt Emerald Princess (built 2007) was docked at Port Chalmers at the time of the accident on Thursday.

Maritime New Zealand is to board the ship on Friday to carry out an investigation.

The captain of the ship spoke to passengers via the intercom and informed them a crew member had died.

Princess parent company Carnival's Australia spokesperson David Jones said: "First reports indicate that the incident happened during some technical work on the hydraulic launching system on a tender vessel," he said.

"We are deeply saddened that a member of Emerald Princess' crew was fatally injured in the incident."

The vessel is on a 12-night cruise from Sydney to New Zealand.