A Swedish newspaper admitted Sunday it did not have proof for an earlier story alleging Israeli soldiers had trafficked the organs of Palestinians, which sparked a diplomatic row with Israel.

In an editorial headlined "The week the world went crazy", Aftonbladet chief editor Jan Helin wrote that the first article on the case published last Monday "lacked" proof of any organ theft.

"I'm not a Nazi. I'm not an anti-Semite. I'm a responsible editing executive who gave the green light to the publication of an article because it asks a number of pertinent questions."

The tabloid followed up its original story that claimed Israeli soldiers had snatched Palestinian youths to steal their organs with an interview with the family of an alleged victim.

Two Aftonbladet reporters interviewed the mother and brother of Bilal Achmad Ghanem, a youth allegedly killed by Israeli troops 17 years ago when he was 19 on suspicion of being a ringleader in the first Palestinian uprising.

They asked his 32-year-old brother Bilal if they had any proof that his organs had been stolen.

"No, I don't have any," he replied. "But I have met people who told similar stories about their loved ones. We have heard many stories like this one."

Swedish Foreign Minister Carl Bildt, caught in the diplomatic storm provoked by the original story, was also interviewed by Aftonbladet.

Sweden, said Bildt, had to be "more careful in explaining to outsiders the way our freedom of expression and freedom of the press work".

Asked if Helin should apologise for the article, Bildt said: "Aftonbladet is responsible for the content it publishes, not the government."

On Friday, Bildt played down the diplomatic row with Israel sparked by the paper's claims.

When asked by reporters if the report would sour relations between the two countries, Bildt said: "I don't think so."

"We have very strong state relationship between Israel and our government. We are both open and democratic societies," he told reporters.

But Israel on Sunday pressed Stockholm to condemn the original report.

"We are not asking the Swedish government for an apology, we are asking for their condemnation," a senior official quoted Prime Minister Benjamin Netanyahu as telling ministers during the weekly cabinet meeting.

Finance Minister Yuval Steinitz of Netanyahu's rightwing Likud party said "the crisis will continue as long as the Swedish government doesn't change its attitude toward this anti-Semitic article.

"Those who do not condemn it are not welcome in Israel."