SAN FRANCISCO >> Apple is temporarily closing its 42 stores in mainland China, one of its largest markets, as a new virus spreads rapidly and the death toll there rose to 259 today.

The iPhone maker said in a statement it was closing stores, corporate offices and contact centers in China until Feb. 9 “out of an abundance of caution and based on the latest advice from leading health experts.”

“Our thoughts are with the people most immediately affected by the coronavirus and with those working around the clock to study and contain it,” the statement said.

Apple’s online store will remain open.

China is the company’s third biggest market in terms of sales behind the United States and Europe and it is also where most iPhones and other devices are made. CEO Tim Cook told analysts on Tuesday that uncertainty due to the outbreak was keeping the Cupertino, California-based company from offering more specific guidance about its financial performance in the coming months after announcing results for the holiday shopping season that were far better than investors anticipated.

That performance propelled Apple’s stock price to new highs earlier this week, but the escalating uncertainty about the situation in China quickly dampened spirits. Apple shares dropped 4% Friday to finish at $309.51

Cook also said the company’s contractors in China have been forced to delay reopening factories that closed for the Lunar New Year holiday.

Cook said the company was looking for ways to minimize supply disruptions. Some of its suppliers are in Hubei, the Chinese province at the center of the outbreak that’s been under lockdown for more than a week.