World Bulletin / News Desk

The United States, Mexico and Canada dove into the details of revamping the North American Free Trade Agreement at a second round of talks Friday, amid threats from President Donald Trump to axe the deal.

There are 25 issues on the agenda for this round, each being discussed at a separate roundtable, including e-commerce, the environment, anti-corruption measures, investment and access to property markets.

The thorny issue of "rules of origin" is also on the list, the Mexican economy ministry said.

The United States is pushing to change these rules, including those governing the hotly debated auto sector. It wants to require a certain percentage of cars' components to be built in the US in order to remain duty-free.

Few details were expected to emerge from the discussions. All three countries have agreed to keep mum on specifics until the talks conclude after an estimated seven to nine rounds.