According to the IDG News Service (http://macte.ch/GUBma), Foxconn, one of Apple’s main manufacturers, said an “incident” involving 2,000 workers erupted late Sunday night near a company manufacturing facility in China.

The Taiwanese company said in a statement on Monday that the incident first started as a “personal dispute”, and then escalated outside employee dorms near Foxconn factories in the Chinese city of Taiyuan. Local police arrived and brought the dispute under control by Monday morning at 3 a.m., according to the IDG News Service.

“According to police, some 40 individuals were taken to the hospital for medical attention and a number of individuals were arrested,” Foxconn said. The company added the cause of the dispute is still under investigation, but said it appeared not to be “work-related,” without offering specifics.