A strike at one of French Polynesia's two public television stations is being pursued over the showing of a seven-minute pornographic film.

The union says it wants a harsher punishment than a warning for the technician who aired the film on Tahiti Nui TV.

It was broadcast after a live interview with the head of the Protestant Church and just before the midday news.

The technician in question said he had made mistake in switching on the film which he wanted to watch in private.