"There have been no official applications for permission to hold gay parades during the May holidays and all attempts to hold such events will be firmly stopped by the authorities," Leonid Krutakov said.
The head of Gay Russia Project, Nikolai Alekseyev, said earlier that several public gay events have been scheduled for May 16, when the final of the 2009 Eurovision Song Contest is due to take place in Moscow.
Over the past three years, the Moscow city authorities have rejected official applications by organizers seeking permission to hold gay parades, on the grounds that the event would interfere with the rights and everyday lives of ordinary Muscovites.
An unsanctioned gay parade took place on Moscow's main Tverskaya Street on June 1, 2008, gathering around 200 people, mostly journalists and curious passers-by. Thirteen people were detained by Moscow police.
Russian gay rights activists have appealed to the European Court of Human Rights five times against decisions by the Russian authorities to ban gay marches in May 2006 and May 2007, and three pickets in 2007.
Moscow Mayor Yury Luzhkov has branded gay parades "Satanic" and vowed that they will never be permitted in the capital, while the Russian Orthodox Church and various far-right groups have vowed to halt any attempt to hold a march in support of gay rights in Russia.