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: