The number of visitors to Hong Kong dropped by 43.7 percent year on year to 3.31 million in October, according to the Hong Kong Tourism Board (HKTB).

The decline has been widening since July as tourism took the major brunt of social unrest. In the first 10 months, the number of visitors went down by 4.7 percent from a year ago.

The HKTB attributed the sharper fall in the last month to continued violent incidents and a high base a year ago, when the number of visitors was boosted by the opening of the Hong Kong-Zhuhai-Macao Bridge and the Hong Kong section of the Guangzhou-Shenzhen-Hong Kong Express Rail Link.

In October, visitors from the Chinese mainland, accounting for about 76 percent of the total, slumped by 45.9 percent year on year. U.S. and Japanese visitors fell by 38.2 percent and 44.9 percent from a year ago, respectively.

The dropping visitor number has forced major carriers to adjust their strategy.

Hong Kong Airlines said in a statement on Friday that it will suspend services to Vancouver, Ho Chi Minh City and Tianjin since February to focus on operating other priority routes under the challenging business environment caused by the ongoing social unrest.