MOSCOW, May 22 (RIA Novosti) - Russia's Health Ministry said on Friday that the first case of human swine flu infection has been diagnosed in Moscow.

"According to a statement by the chief doctor of the First Infectious Diseases Hospital, a patient has been hospitalized... and was put directly into an isolation ward," the spokesman said.

The man is in a stable condition with a normal temperature, he said.

Earlier, Russia's chief sanitary official Gennady Onishchenko told RIA Novosti that the man had returned to Moscow from the U.S. on the night of May 21, and had initially been suspected of carrying the A/H1N1 virus. However, Onishchenko said that the patient turned out to be suffering only from sinus trouble.