WASHINGTON • US President Donald Trump threatened Japan's Prime Minister Shinzo Abe that he would ship 25 million Mexicans to his country, one of a series of bizarre statements at last week's acrimonious G-7 meeting, according to a report.

The Group of Seven summit gathering of top industrialised democracies finished in disarray after Mr Trump abruptly rejected its consensus statement and bitterly attacked Canada's Prime Minister Justin Trudeau.

Behind the scenes, Mr Trump's counterparts were dismayed by verbal jabs on topics ranging from trade to terrorism and migration, The Wall Street Journal said on Friday, quoting European officials who were present.

At one point, Mr Trump described migration as a big problem for Europe.

He then said to Mr Abe: "Shinzo, you don't have this problem, but I can send you 25 million Mexicans and you'll be out of office very soon," creating a sense of irritation in the room, according to an EU official.

The source added that when the topic turned to Iran and terrorism, Mr Trump took aim at French President Emmanuel Macron, saying: "You must know about this, Emmanuel, because all the terrorists are in Paris."

European Commission President Jean-Claude Juncker was repeatedly described by Mr Trump as a "brutal killer" in reference to the bloc's antitrust and tax fines against US tech companies that have run into billions of dollars.

Bitter differences over trade dominated the summit hosted by Canada, with leaders of the world's largest economies lining up against Mr Trump's threats to impose stiff tariffs on imported steel and aluminium.

Mr Trump on Friday rejected reports of discord, blaming the "Fake News Media" while posting several photos of himself appearing to get along well with fellow G-7 leaders.

AGENCE FRANCE-PRESSE