[HONG KONG] Hong Kong stocks tumbled with global markets on Friday after Donald Trump fanned fears of a trade war by slapping tariffs on key steel and aluminium imports.

The Hang Seng Index fell 1.33 per cent, or 412.35 points, to 30,631.90 soon after opening.

And the benchmark Shanghai Composite Index lost 0.77 per cent, or 25.30 points, to 3,248.45, while the Shenzhen Composite Index, which tracks stocks on China's second exchange, dropped 0.67 per cent, or 12.32 points, to 1,821.69.

AFP