A Moscow city official says government employees will undergo lie-detector tests as an anti-corruption measure.

Nataliya Sergunina of the city's economic policy office says Monday that "polygraph tests have become an essential part of preventing corruption. Special attention will be paid to those who work in purchasing."

Russia's Interfax news agency says the bureaucrats will also undergo a voice-analysis test.

Polygraph tests measure heart rate, blood pressure, respiration and skin conductivity to determine if a person is telling the truth. But according to the American Psychological Society, the test results are fraught with error.

Russia ranks as the 119th most corrupt country in the world out of 168 in a report by the anti-graft watchdog Transparency International.