Stockholm - Sweden's new law on monitoring data traffic within the country is coming under pressure with the heads of the eight leading mobile phone service providers signing a letter protesting against it Thursday.

The letter published in the Dagens Nyheter newspaper also said that the Google search company is considering withdrawing its servers from Sweden because of the law.

The surveillance law allows the authorities to monitor all international telephone calls and emails sent via international servers without a court order or warrant.

Political representatives have received more than six million protest emails since the law was passed in mid-June.

The Svenska Dagbladet newspaper reported that the real reason for the law is so Swedish intelligence can monitor data traffic to and from Russia, much of which travels through Sweden. (dpa)