A Chinese appeals court on Friday upheld death sentences for three people convicted over a mass stabbing that killed 31 people earlier this year, state media reported.

"The Higher People's Court of Yunnan Province rejected Hasayn Muhammad's appeal and upheld the penalty meted out by the Kunming Municipal Intermediate People's Court last month," Xinhua said in a brief dispatch from Kunming.

The Intermediate People's Court in the southwestern Chinese city had convicted and sentenced to death Hasayn Muhammad and two others for "leading a terrorist group" which planned and carried out the attack at the city's railway station on March 1.

Though Xinhua only mentioned Hasayn Muhammad's appeal, it said that the court upheld the sentences of the other two men as well.

In a separate report on its website, Xinhua said the court also upheld a term of life in prison for a pregnant woman also convicted for taking part in the attack.

The next step in the judicial process is for the death sentences to be reviewed by China's Supreme Court.

The bloodshed in Kunming, located in the southwestern province of Yunnan, also saw more than 140 people wounded and was dubbed "China's 9/11" by state-run media.

Beijing blamed it on "separatists" from the resource-rich far western region of Xinjiang, where at least 200 have died in attacks and clashes between locals and security forces over the last year.

The mass knifing in Kunming was the biggest-ever violent incident against civilians outside the region. Incidents have grown in scale and sophistication and have spread outside the restive area since late last year.

Rights groups accuse China's government of cultural and religious repression they say fuels unrest in Xinjiang, which borders Central Asia.

China defends its policies, arguing it has boosted economic development in the area and that it upholds minority and religious rights in a country with 56 recognised ethnic groups.

Mayor in China's Xinjiang probed for graft: govt
Beijing (AFP) Oct 31, 2014 - The Uighur mayor of a violence-racked city in China's far-western Xinjiang region is being investigated for corruption, a government notice said, as central authorities broaden their highly publicised anti-graft probe.

Adil Nurmemet, the mayor of Hotan, is being probed for suspected "serious disciplinary violations", according to a notice posted Thursday on the website of the regional discipline inspection commission, the Communist Party's internal watchdog.

Hotan, known as Hetian in Mandarin, is an oasis town in Xinjiang's southwest, on the edge of the Taklamakan Desert.

Nearly 90 percent of its 320,000 population are members of the mostly-Muslim Uighur minority, the state-run China Daily newspaper said Friday, as is Nurmemet according to previous reports.

Beijing has blamed a series of recent attacks on violent separatists from the vast, resource-rich region, where information is often difficult to verify independently.

The incidents have grown in scale and sophistication over the last year and have spread outside the restive area.

In August, police in Hotan shot dead nine suspected "terrorists" and captured one after discovering the group in a cornfield, according to state media.

Rights groups accuse China's government of cultural and religious repression they say fuels unrest in Xinjiang, which borders Central Asia.

Under President Xi Jinping, China's ruling Communist Party has repeatedly vowed to combat rampant graft in the face of public anger over the issue.

No details were given regarding Nurmemet's case.

But according to the China Daily, Communist Party authorities have also set up a "political discipline inspection office" in Xinjiang.

The office probes alleged misconduct tied to religious affairs, "including taking bribes in connection with organising pilgrimages to Mecca for local Muslims", the newspaper said, adding that 13 such cases have been handled this year.