Stock markets around the world fell following the introduction of tariffs by US President Donald Trump on goods entering the US from China, Canada and Mexico.
Trump has imposed 25% tariffs on imports from Canada and Mexico, and 20% tariffs against China.
Canada and China announced their own import taxes on US goods, while Mexico said it had "contingency plans", sparking fears of full-blown trade war.
Analysts have warned tariffs could push up prices for US households and could also have a knock on effect on consumers across the world.
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