Mexico now has the third most COVID-19 deaths in the world, behind the United States and Brazil, while former success story Vietnam is struggling to control an outbreak spreading in its most famous beach resort.

The United States, Mexico and Canada signed a deal Tuesday to finalise their new trade agreement, paving the way to ratification after more than two years of arduous negotiations.

A host of top officials resigned along with him, including his vice president and the heads of both houses of Congress, leaving the country with no clear leader and torn by looting and riots.

Mexico welcomed the International Court of Justice's (ICJ) ruling in Indian national Kulbhushan Jadhav's case, saying that the Court deepened its jurisprudence on consular law through the case and reiterated that rules under the Vienna Convention on Consular Relations are not dispensable rules that states can or cannot choose to respect.

As a result of their ongoing trade, China is no longer the top trading partner of the United States and has been replaced by America's neighbours Mexico and Canada, according to a media report.

The numbers of Indians crossing US borders from Mexico has steadily risen in recent years, according to immigration officials. They are among thousands of Africans and Asian migrants making the arduous journey, led by smuggling cartels.

Speaking as the two neighbours opened a tense day of talks -- which Trump has vowed will be the last -- White House communications chief Mercedes Schlapp said Mexico's proposals so far to slow the surge of Central Americans crossing the border were "simply not enough."

Customs and Border Protection officials said most of the migrants were families from Guatemala, Honduras and El Salvador, and the total included some 57,718 children.