European shares fell on Monday, led by automobiles, as the U.S. President Donald Trump's latest threat to impose steep tariffs on the European Union and Mexico kept investors on edge.

European trade ministers are meeting in Brussels after U.S. President Donald Trump announced 30% tariffs on the European Union.

Mexican President Claudia Sheinbaum called for the country to keep “a cool head,” but a sense of exasperation swept over people involved in the U.S. negotiations.