MOSCOW, October 5 (RIA Novosti) - The number of people diagnosed with swine flu in Russia has risen to 570, Russia's top sanitary official said on Monday.

"A total of 570 cases have been officially confirmed across Russia, with 491 cases diagnosed among people who traveled abroad," Gennady Onishchenko said.

He also dismissed reports that several schools in Moscow had been closed because of the spread of swine flu, or A/H1N1 virus.

"No schools were closed in Moscow, only a few classes, and only because of the spread of the seasonal flu," the official said, adding that a total of 41 classes had been closed.

According to the latest report from the World Health Organization, 340,000 cases of swine flu have been confirmed throughout the world and 4,100 people have died from the virus as of September 27.