STOCKHOLM — Four major Swedish newspapers have threatened to boycott a Britney Spears concert in Stockholm because of restrictions imposed on their photographers.

Spears is scheduled to perform in the Swedish capital on July 13.

Dagens Nyheter, Svenska Dagbladet, Expressen and Aftonbladet say they won't send photographers to the show unless Spears agrees to scrap certain conditions on how the images can be used.

The contract bars the papers from reselling the pictures and from publishing them more than 30 days after the concert.

Dagens Nyheter photo editor Roger Turesson said Friday "the next step would be to tell critics they can't write anything critical."

Local representatives of Spears' record label Sony BMG did not immediately answer phone calls seeking comment.