Hundreds of workers at Apple’s main iPhone-making plant in China clashed with security personnel on Wednesday, as tensions boiled over after almost a month under tough restrictions intended to quash a COVID-19 outbreak.

Workers at the Foxconn Technology Group plant streamed out of dormitories in the early hours of Wednesday, jostling and pushing past the white-clad guards they vastly outnumbered, according to videos sent by a witness to portions of the protest. Several white-suited people pummeled a person lying on the ground with sticks in another clip. Onlookers yelled "fight, fight!” as throngs of people forced their way past barricades. At one point, several surrounded an occupied police car and began rocking the vehicle while screaming incoherently.

The protest started overnight over unpaid wages and fears of spreading infection, according to the witness, asking to remain anonymous for fear of repercussions. Several workers were injured and anti-riot police arrived on the scene Wednesday to restore order, the person added.