The U.S., Mexico and Canada ended the first round of talks on a new North American Free Trade Agreement saying they're committed to wrapping up the negotiations quickly with a far-reaching deal.

"While a great deal of effort and negotiation will be required in the coming months, Canada, Mexico and the United States are committed to an accelerated and comprehensive negotiation process that will upgrade our agreement and establish 21st century standards to the benefit of our citizens," the countries said in a statement Sunday, after five days of discussions in Washington.

The next round of negotiations is scheduled for Sept. 1-5 in Mexico, with talks moving to Canada in late September and back to the U.S. in October. Additional rounds are being planned "for the remainder of the year," the countries said.