MEXICO CITY - Canada and Mexico have signed a pact to deepen economic and security ties ahead of what is expected to be a challenging round of negotiations with the United States on a trilateral trade deal.

The agreement — billed as a comprehensive strategic partnership — was signed by Prime Minister Mark Carney and Mexican President Claudia Sheinbaum in Mexico City Thursday.

It includes a plan to build infrastructure such as ports, rail and energy corridors while tackling crime and protecting the environment.

"Today, we're beginning a new era of elevated co-operation with a comprehensive strategic partnership," Carney said at a joint press conference in Mexico City Thursday evening.

Carney and Sheinbaum emphasized that the deal will "complement" the Canada-United States-Mexico Agreeme

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