Burberry warns fall in Hong Kong sales could impact its full-year margin.

British luxury brand Burberry warned on Wednesday that a fall in sales in the key market of Hong Kong in the last quarter of 2014 could impact its full-year margin.

Pro-democracy protests began choking parts of the Asia financial center in late September, disrupting business in one of the world’s top markets for luxury companies, which accounts for about $9.7 billion of global luxury sales, or 4 percent of the total, according to estimates by Bernstein Research.

Burberry retail sales rose 14 percent to 604 million pounds ($916 million) in its October-December third quarter, with comparable growth of 8 percent, steady on the previous quarter.

Burberry store at Pacific Place Hong Kong