US President Donald Trump was leaving a Group of Seven summit early on Monday as he hinted of greater involvement in the Israel-Iran conflict after issuing an ominous warning for the capital Tehran to evacuate.

Japanese Prime Minister Shigeru Ishiba pushed back against Trump's agenda of levying higher tariffs on imported goods, arguing it would hurt economic growth. The Japanese leader specifically called Trump ahead of the summit to confirm their plans to talk on the sidelines, which is a greater focus for Japan than the summit itself.