A video circulating online showing a McDonald’s employee getting snow outside the restaurant on Mount Tianzi in Zhangjiajie, central China’s Hunan province, has made people wonder if the employee used snow to make drinks, ThePaper.cn reported.

The video photographer, surnamed Yang, said that he did not see the employee making coffee or milk with the snow, but some of his friends developed diarrhea after dining at the restaurant.

Yang said that the road closures caused by heavy snow should not be an excuse for the restaurant to do such things to its customers.

McDonald’s responded the next day on Jan. 31, calling the situation a misunderstanding. The snow dug by the employee was used for cleaning the restaurant, and not for making food or drinks, it said, adding that the restaurant will also get in touch with those involved as soon as possible.