Tensions are still high at electronics manufacturer Foxconn despite pledges to raise the quality of living for workers.

On Monday night a huge riot started at a Chengdu dormitory over a tiny incident. According to Taiwan-based WantChinaTimes, workers with a grudge against the security guards prevented them from catching a thief. Soon up to 1,000 workers were "throwing trash bins, chairs, pots, bottles and fireworks from the upper floor of the building and destroying public facilities."

They were restrained after two hours by hundreds of police officers, who arrested dozens of workers.

A recent Guardian report found that conditions at Foxconn factories are still awful.

UPDATE: Foxconn Technology Group offered this alternate story:

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.