Mexico has refused a request from President Donald Trump's administration to allow a U.S. military aircraft deporting migrants to land in the country, a U.S. official and a Mexican official told Reuters.

Donald Trump’s proposed tariffs on Mexico would amount to the US “strangling” itself and are likely to force production to shift to south-east Asia, the head of one of the world’s largest manufacturers of car circuitry has warned.

The president's pledge to slap 25 percent tariffs on Canada and Mexico could see the prices of goods soar for U.S. consumers.