Yet another negative story coming from China regarding the already embattled Foxconn plant...

This morning, news broke that a 2,000-person riot occurred at Foxconn’s plant in Taiyuan, China, a facility which makes Apple, Microsoft, and Hewlett-Packard products. National Public Radio (NPR) reports that 5,000 police officers were called to the scene and the factory is now closed. It may be opened again tomorrow.

The cause of the riot has not been officially determined. While both NPR and The Washington Post report that the government-run Chinese newspaper, Xinhua, cites the catalyst as a disagreement among workers from different regions in China, another story has emerged online.

Foxconn employees have taken to Chinese social media sites to state that the cause of the riot had to do with worker treatment, especially by security guards.

This hasn’t been a good year for Foxconn. In April, the Fair Labor Association found no less than 50 “serious and pressing non-compliances” with China’s labor laws in Foxconn factories. In June, workers rioted at the Chengdu facility and a week later a worker killed himself. About two weeks ago, advocacy groups alleged teachers were having their students work on Foxconn’s assembly lines.

It’s also worth noting that Apple released its latest iPhone model on Friday, though there’s no word if this meant longer shift hours for factory workers at Foxconn plants.