Canada's Prime Minister Mark Carney has said a fresh wave of US tariffs on Canada is a "miscalculation" designed to "hurt and divide us", after trade talks broke down late on Friday.

Carney said he walked away from a deal because he was not prepared to "compromise Canada's sovereignty".

"They asked too much and they offered too little," Carney said in a speech to Canadians on Saturday morning.

The prime minister added that Canada will match US tariffs "dollar-for-dollar" from 8 September, including levies on steel, dairy, appliances and electronics. Donald Trump has yet to comment.

Both countries were optimistic of a deal earlier in the week, but talks collapsed on Friday night after both sides accused the other of making last-minute changes.

Now that talks have broken down, Canada will be hit with new 50% US tariffs on a range of Canadian goods, in addition to existing US tariffs on Canadian steel, aluminium, automobiles and lumber.

The prime minister said Canada was retaliating "reluctantly" to protect its interests. Details of the counter-measures will be released in the coming days, he said.

Carney's speech on Saturday is his first address to Canadians after he announced late on Friday night that deal would not be reached, accusing the Americans of making "last-minute changes" that were "unfair" and "uneconomic".

US negotiators, meanwhile, accused Canada of making "new demands and walk backs" on terms which had been agreed earlier in the week.

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