URUMQI, China -  The United States is encouraging "terrorism" in Xinjiang, Chinese state media said Monday, also claiming that separatists in the region -- which has a large Uighur minority -- had fought alongside Syrian rebels.

Beijing denies that the unrest in the vast region bordering Central Asia -- which last week left at least 35 people dead -- is due to ethnic tensions between Uighurs and China's majority Han.

It has vowed to crack down on terrorist groups and ordered military exercises ahead of Friday's anniversary of major riots in 2009 that left around 200 dead.

The People's Daily, a mouthpiece for the ruling Communist Party, slammed the US government and media for what it said was its role in the violence.

"For fear of a lack of chaos in China," it said in a commentary, the US was "conspiring to direct the calamity of terrorist activities toward China".

"America's double standards on the issue of countering terrorism is no different than incitement and indulgence... How is this different than those who act as accomplices to terrorism?" it said.

It asked if the 9/11 attacks and Boston marathon bombings in April meant "America's ethnic and religious policies also have problems", while rejecting such linkages in China.

"The violent terrorist incidents in Xinjiang are not an ethnic issue or a religious issue," it said, calling the "massacres" of officials and bystanders "inhumane".

According to the official Xinhua news agency, "knife-wielding mobs" attacked police stations and other sites in the town of Lukqun last Wednesday before security personnel arrived and opened fire. At least 35 people were killed.

Two days later, Xinhua said, more than 100 terrorists provoked riots in the prefecture of Hotan, attacking people "after gathering at local religious venues". Last Friday a US State Department spokesman said it was "deeply concerned about ongoing reports of discrimination against and restrictions" on Uighurs in China.

He said the US urged a "transparent investigation" but did not want to "draw broader conclusions" about the incidents.

The state-run Global Times criticised Western media and public opinion Monday for misrepresenting the violence as ethnic conflict, referring to "violent terrorism fuelled by the West".

"Western public opinion is fooling these ignorant extremists through cheap support," the paper said in an editorial.

This "indulges the views of these violent terrorists, who are in fact a small, isolated group", it said.

In a separate article only available in Chinese, the paper accused members of the "East Turkestan" movement of joining "terrorist groups" in Syria to fight the government of Bashar al-Assad before returning to Xinjiang to plot attacks.

It cited the case of a man in his 20s recruited by an "education and mutual aid association" acting as a terrorist training front.

After being sent to Syria, the recruit was ordered back to Xinjiang to "raise" the level of the struggle there, where he was caught.