Foxconn, the company that makes Apple's iPhones, has suspended production at a factory in northern China after a brawl that involved as many as 2,000 workers and left about 40 people injured.
The clash erupted late Sunday in a privately-managed dormitory for Foxconn employees who work at the company's factory in Taiyuan.
China's Xinhua news agency says 5,000 police officers were dispatched to the dormitory and brought the chaos under control early Monday.
Foxconn says the incident appears to have started as a personal dispute and does not appear to be work related.
The Taiyuan plant employs 79,000 workers and manufactures automobile electronic components, consumer electronic components, and precision moldings.
Foxconn, owned by Taiwan's Hon Hai, is the world's largest contract maker of electronic goods and employs about one million workers in factories across China.
The company has faced scrutiny over complaints about its wages and working conditions.
Some information for this report was provided by AP, AFP and Reuters.