US President Donald Trump and Japanese Prime Minister Shigeru Ishiba failed to reach an agreement on a trade package on the sidelines of the Group of Seven summit, an outcome that leaves the Asian nation inching closer to a possible recession as the pain of US tariffs hits its economy.

President Trump will cut short his trip to Canada for a meeting with world leaders and fly back to Washington late Monday, Press Secretary Karoline Leavitt said, citing "what's going on in the Middle East.

Blasts have been heard in Tehran and sirens have sounded in Israel as US president convenes National Security Council.