The Hang Seng Index sank 1.91 percent, or 483.06 points, to 24,766.72.
The benchmark Shanghai Composite Index dived 2.40 percent, or 62.37 points, to 2,540.93, while the Shenzhen Composite Index, which tracks stocks on China's second exchange, tumbled 2.99 percent, or 37.47 points, to 1,259.75.