MOSCOW. May 8 (Interfax) - Rights organizations are concerned about an increasing number of hacker attacks on public organizations and parties' Internet resources.

"Eleven Internet sites have been attacked by hackers this year, including the sites of Jewish organizations, and of regional branches of the Union of Right Forces and communist youth organizations," Galina Kozhevnikova, deputy director of the Sova information-Analytical Centre, told Interfax.

Radical nationalist organizations stand behind hacker attacks as a rule, she said.

Kozhevnikova said law enforcement agencies do not pay due attention to hacker attacks.

Other rights activists share this concern.

"Hackers are, unfortunately, supported by individual politicians who exploit xenophobia as a slogan," Alexander Brod, head of the Moscow Bureau for Human Rights, earlier told Interfax.

The Moscow Bureau for Human Rights is monitoring instances of xenophobia in Russia.

"I can't cite any instance when legal action would be started against a nationalist organization involved in hacker attacks," Brod said.

A hacker broke into the website of the Moscow Helsinki Group last summer. According to some sources, responsibility for the attack was later claimed by the Slavic Union ultra-right national-socialist movement. The Internet resources of the Sova center, the Communist Youth Union, the Global Jewish On-Line Center and other organizations also suffered from hacker attacks in 2005.