Russian special forces have foiled the attempted hijacking of an aircraft on a domestic flight from Mineralniye Vody, in the Caucasus region, to Moscow's Domodedovo airport.

All 105 passengers were freed unhurt after special forces disguised as doctors boarded the aircraft at the airport.

The hijacker, who claimed he had important information, held the crew and passengers for two hours after landing, demanding a meeting with law enforcement officials and journalists.

The 30-year-old passenger also handed a note to a crew member demanding a meeting with Vladimir Putin, the country's prime minister, according to a statement by federal investigators.

The rescue operation, involving Russia's special FSB forces and police agents, ensued when the hijacker agreed to allow medics aboard to treat passengers who had fallen ill.

Doctors went aboard, accompanied by police dressed as medics, and the man was overpowered, said Tatyana Trunova, a spokeswoman for transport police.

"It was the fastest aircraft-freeing operation in the history of civil aviation," said Yelena Galanova, an airport spokeswoman.

Russian news agencies cited police officials as saying the man was not armed.

Mineralniye Vody is in Russia's troubled North Caucasus region, which suffers daily violence attributed to separatist fighters.