ST. PETERSBURG, September 29. /TASS/. The Arbitration Court of St. Petersburg and Leningrad region has partially upheld the claims of Universal Music and Warner Music to Russia's most popular social network, VKontakte, obliging the company to install a filtering technology for audio files to prevent a copyright infringement.

At the same time the court refused to oblige Vkontakte to pay 36 million rubles ($548.7 mln) to the recording studios, a spokesperson with the International Federation of the Phonographic Industry / IFPI / told TASS on Tuesday.

"The court upheld the demand of the record companies obliging Vkontakte to create an effective system which would exclude the possibility of downloading pirated audio content on the site, which means that the network must remove all illegal tracks belonging to companies and prevent their appearance on the service in the future", the spokesperson said.