Cyber-dissident Hu Jia, seen with his wife, Zeng Jinyan, was jailed in April after lobbying to bring attention to harassment of other activists in China. Bookmakers see him as a Nobel Peace Prize favourite. (AP)

Human rights activists are said to be the favourites to win this year's Nobel Peace Prize — including Chinese dissidents Gao Zhisheng and Hu Jia, Russia's Lidia Yusupova, Vietnam's Thich Quang Do or the group Human Rights Watch.

Even mentioning a Chinese dissident as a possible winner brought threatening growls of disapproval from Beijing, which declared Thursday that Hu, a jailed dissident, was not a legitimate contender.

"If the prize is awarded to such a person, it would be against the purpose of such a prize," Chinese Foreign Ministry spokesman Qin Gang said, adding that it should go to someone who has "truly made contributions to world peace."

Until Friday's announcement, the name of the winner or winners is one of Norway's most closely guarded secrets. The secretive five-member Norwegian awards committee won't even say who the candidates are, just the number of nominations — 197 this year — and when the announcement will be made: 0900 GMT (5 a.m. ET).

Other possible winners include:

• Zimbabwe's former opposition leader Morgan Tsvangirai.
• Ingrid Betancourt, the French-Colombian politician and anti-corruption activist rescued this year after being held for six years by Marxist FARC rebels.
• The Cluster Munitions Coalition.
• The African Union, for restoring peace in Kenya after election-sparked riots.

Speculation is leaning heavily toward a human rights prize because the committee has often linked its award to the anniversary of some significant event. This year is the 60th Anniversary of the signing of the UN Declaration of Human Rights.

Coincidentally, the declaration was signed on Dec. 10, the date of the annual Nobel Prize ceremonies and the anniversary of prize founder Alfred Nobel's death in 1896.

Post-Olympics signal to be sent?

China is in the spotlight after its successful Beijing Olympics. The committee might want to remind China's leaders that the world has not forgotten its crackdown in Tibet and on human rights activists, including Gao and Hu, both arrested ahead of the Games and still in jail.

Hu began by campaigning for the rights of HIV/AIDS patients but became a brash human rights activist who chronicled the arrests and harassment of other activists until he was sentenced to 3½ years in prison in April.

Gao is a lawyer who became a prominent critic of China's civil rights.

Stein Toennesson, director of the Peace Research Institute in Oslo, whose picks tend to shape world speculation, said last week that the prize committee might pick a Chinese activist because "the Olympic Games did not bring the improvement many had hoped for but instead led to a number of strict security measures."

Last year, he correctly guessed that former U.S. vice-president Al Gore would share the prize for his climate awareness campaign.

Odds are on Hu to win

Irish bookmaker Paddypower was giving 7-4 odds on Hu on Thursday but did not list Gao. Nordic bookmaker Betsafe had 5½ to 1 odds on Hu and 10-1 on Gao.

The last time the Nobel committee took a slap at China, with the 1989 award to Tibet's spiritual leader, the Dalai Lama, Beijing reacted with rage, threatening to break off relations with Norway if anyone from the government or the royal family attended the awards ceremony.

The king and queen and other government members attended anyway.

The awards committee is appointed by Norway's parliament but answers neither to the legislators nor the government.

Toennesson, and others, said the committee could also pick the 80-year-old Vietnamese monk and dissident Do (4-1 odds from Paddy and 7-1 from Betsafe), who works for religious freedom, democracy and human rights.

Russian human rights lawyer Yusupova is also seen as a possible pick and would be a sign of sharp criticism of the Kremlin's crackdown on press freedoms and human rights.

Congolese pastor a long shot

Helge Hveem, a professor of political science at the University of Oslo, was backing a little-mentioned long-shot: Eastern Congo Pastor Bulambo Lembelembe Josue for his efforts to ease ethnic tensions.

Hveem wrote that the Congo is one of the world's most violent places and that Josue "meets violence with fearless mediation, suggestions and peace efforts."

The peace prize is presented in Oslo while Nobel prizes for medicine, chemistry, physics and economics are handed out in Stockholm, Sweden.