McDonald's Korea said Thursday it has been forced to "temporarily" halt sales of french fries, citing an unspecified supply chain issue within the company. "Due to an unexpected issue within our supply chain, we are temporarily unavailable to provide French Fries," McDonald's Korea said in a statement posted on its website. "We sincerely apologize for any inconvenience, and we will do our best to resume sales as soon as possible," the statement said. It is unknown what "unexpected issue" has forced the company to suspend sales of french fries. Last month, McDonald's Korea raised the prices of 16 menu items by an average of 2.8 percent. The price of the signature Big Mac increased from 6,900 won (US$5.20) to 7,200 won. Source: Yonhap News Agency