TAIYUAN, SHANXI, CHINA -- Foxconn shut a local factory that builds casings for Apple's iPhone following a massive riot that pit thousands of employees against company guards.

The riots, said to involve at least 2,000 of the campus's 79,000 workers, escalated after an altercation between a company guard and an employee. At least 40 persons were taken to the hospital, according to published reports.

Police in riot gear have been photographed at the scene, along with trash and an overturned guard tower, according to NBC and Reuters.

Residents have taken to Weibo, China's version of Twitter, uploading photos (see below) and video of police at the site.

The factory builds metal casings for the Apple iPhone. Workers also went on strike there in March over wages.

Taiyuan is the capital and largest city of the Shanxi province, in North China.

PCB West: The Silicon Valley's leading printed circuit design and manufacturing conference: Sept. 25-27, 2012 www.pcbwest.com

山西太原，中国 - 富士康关，建立当地的工厂为苹果的iPhone外壳后，一个巨大的骚乱，数千名员工违反了公司的警卫坑。

的骚乱，至少有2000名涉及校园的79,000工人，公司后卫和雇员之间发生口角后升级。至少有40人被送往医院，根据公布的报告。

全副武装的防暴警察已在现场拍摄的，随着垃圾和推翻的守卫塔，据美国全国广播公司和路透社。

居民们微博，中国版的Twitter，上传照片（见下文），在现场的警察和视频。

工厂建立了针对苹果iPhone的金属外壳。工人也举行了罢工，在三月份工资。

太原是山西省的首都和最大的城市，中国北方。