According to a brief in the Want China Times, workers in the Foxconn plant in Chengdu rioted in a male dormitory, throwing bottles, trash, and furniture after plant security came to the dormitory to investigate a thief.
Approximately 1,000 workers threw trash bins and paper and set off fireworks on dormitory balconies. Twelve workers were arrested by Chinese police.
The riot ended after two hours.
The Chengdu plant caught fire in May of last year and the employees had remaining grievances that stemmed the riot. The plant makes LCD displays for various devices, including the iPad.
UPDATE – Foxconn sent along a note about the incident:
We were informed by local law enforcement authorities that late Monday night, several employees of our facility in Chengdu had a disagreement with the owner of a restaurant located in that city. We were also informed that the employees subsequently returned to their off-campus residence, owned and managed by third-party companies, at which time a number of other residents also became involved in the disagreement and local police were called to the scene to restore order. Foxconn is cooperating with local law enforcement authorities on their investigation into this incident.