Nine assailants wielding axes and knives were shot dead during an attack on a police station in China’s restive Xinjiang region after they killed two police officers, state media reported Sunday.

Nine assailants wielding axes and knives were shot dead during an attack on a police station in China's restive Xinjiang region after they killed two police officers, state media reported Sunday.

The assault took place at about 5:30 pm (0930 GMT) on Saturday in the Serikbuya Township of Bachu County in Kashgar Prefecture, the official Xinhua news agency said, quoting local police.

Xinhua said the attackers were armed with knives and axes and that two other police officers were also injured, apart from the two auxiliary officers who died. The agency gave no further details.

But Dilxat Raxit, a spokesman for the World Uyghur Congress, a Munich-based advocacy group, said the Uighurs were protesting and that armed Chinese personnel were to blame for the violence.

He said in an email that besides the deaths, "several tens" of Uighur demonstrators were arrested.

"I again call on international society to take emergency measures to stop the Chinese government from directly opening fire to suppress Uighur protesters and depriving them of using legal appeals and defending their rights," he added.

The reported incident comes at a time of heightened tensions within Xinjiang following a fiery attack in Beijing's Tiananmen Square last month that the government blamed on "terrorists" from the province backed by international extremist militants.

Three Xinjiang Uighurs drove their car loaded with petrol canisters into the gate of the Forbidden City on October 28. The attack left two dead besides the three people in the car, and 40 injured, according to Chinese police.