I don't dismiss the possibility that the Kunming attack originates locally, but from faraway I'd still go for a link to Xinjiang - which is of course what the (official) Chinese media are indicating.

There is a thread on the violence in China's Far West, which includes Xinjiang Province:http://council.smallwarsjournal.com/...read.php?t=246

Normally I'd post this report there, today it is here:
Police in Northwest China's Xinjiang Uyghur Autonomous Region on Friday shot dead six attackers, while another six died in an explosion, local authorities revealed Saturday.

Two explosions took place in a beauty salon and a grocery market in Xinhe county, Aksu prefecture at around 6:40 pm Friday. A group of terrorist suspects threw explosives at police, who were making arrests, and police opened fire and gunned down six, the Xinjiang government announced on its official website ts.cn.
Link:http://www.globaltimes.cn/content/83...l#.UxMeDuN_vk9

It is noteworthy that I've yet to see any foreign reporting from Kunming, where I'd be surprised foreign reporters are based. In the past far better, non-orchestrated reporting has come from non-Chinese sources, e.g. a visiting BBC World Service reporter in Lhasa, Tibet a few years ago.