Canada's Foreign Minister Mélanie Joly has told the BBC she takes US President Donald Trump's remarks on making Canada the 51st state of his country "very seriously".

"This is not a joke anymore," Joly told Newsnight. "There's a reason why Canadians, when they go out on a hockey game, are booing the American national anthem... We're insulted. We're mad. We're angry."

Her comments come after Trump imposed 25% tariffs on products entering the US from Canada on Tuesday. Canada's Prime Minister Justin Trudeau called that a "very dumb thing to do" and announced retaliatory tariffs.

However, US Commerce Secretary Howard Lutnick said Trump would "probably" announce a deal to reduce tariffs.

In response, Joly told the BBC that "at the end of the day, the only one that really takes a decision is President Trump".

She said no Trump administration secretaries had contacted their Canadian counterparts on Monday or Tuesday about tariffs.

Trump announced 25% tariffs on Canada and Mexico on February 4, but delayed implementation until March 4. Canadian energy imports face a 10% tariff.

Ontario Premier Doug Ford implemented a 25% surcharge on electricity exports to three US states, and if tariffs escalated, said he would consider cutting Michigan, New York and Minnesota off from Canadian power.