Hong Kong (CNN Business) Japanese carmaker Toyota (TM) is keeping its China plants closed for at least another week as the coronavirus outbreak continues to spread.

The coronavirus has killed more than 630 people, mostly in China. Globally, it has infected over 31,400 people across 25 countries and territories.

Toyota, the world's second largest carmaker, had been weighing whether to resume operations on February 10 as recently as Thursday. Car plants across China have been closed since late last month for an extended Lunar New Year holiday as authorities try to contain the virus.

But on Friday, a Toyota spokesperson told CNN Business that the company is preparing for "normal operation" to resume no earlier than February 17, and warned that there could be more delays.

"The situation varies depending on the plant and its supply of parts. Also, there are additional considerations that must be given to the guidelines from local and region governments, including things like logistics, so we cannot definitively say whether we will restart plant operations from February 17," the spokesperson said.

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