Facebook says it will allow postings of an iconic 1972 photo of a naked, screaming girl running from a napalm attack in Vietnam, after a Norwegian revolt against the tech giant.

Facebook originally deleted postings of the image by Norwegian Prime Minister Erna Solberg and others.

Protests started last month after Facebook deleted the Pulitzer Prize-winning image by Associated Press photographer Nick Ut from a Norwegian author's page, saying it violated its rules on nudity.

As others posted the image in protest, Facebook deleted those too. Initially, it stood by the decision, saying it was difficult to create a distinction between allowing a photograph of a nude child in one instance and not others.

But on Friday it said it would allow sharing of the photo, "because of its status as an iconic image of historical importance."