Samsung Electronics, LG display and LG Innotek have shut their factories in South Korea after a worker tested positive for the coronavirus, the companies said on Sunday.
Samsung said that its mobile device factory in Gumi will be closed until Sunday evening for disinfection work while the floor where the infected employee worked will reopen on Tuesday afternoon.
A Samsung employee was tested positive for the virus on Saturday.
The Gumi line makes Samsung's Galaxy Z Flip and Galaxy S20 premium phones, though its production accounts for a small portion of the company's entire smartphone output.
Meanwhile, LG Innotek shut down its factory in Gumi on Sunday after one of its workers was confirmed to have contracted the virus, a company official said.
The plant will also be closed on Monday for disinfection.
LG Display has also temporarily halted work at a smartphone screen factory in Gumi, South Korea after a bank worker near the facility tested positive for COVID-19. The company expects to resume production on March.