OTTAWA (Reuters) - The leaders of Canada and the United States discussed U.S. tariffs on Canadian steel and aluminum on Monday but no talks on lifting the sanctions are planned, a Canadian source familiar with the matter said.

FILE PHOTO: U.S. President Donald Trump shake hand with Canada's Prime Minister Justin Trudeau as they attend the USMCA signing ceremony together with Mexico's President Enrique Pena Nieto before the G20 leaders summit in Buenos Aires, Argentina November 30, 2018. REUTERS/Andres Stapff

After the conversation between Prime Minister Justin Trudeau and U.S. President Donald Trump, Trudeau’s office released a statement saying the two men had “discussed next steps in addressing steel and aluminum tariffs.” It gave no details.

A White House statement said the two leaders discussed “bilateral trade issues,” but did not elaborate.

The Canadian source, who requested anonymity given the sensitivity of the situation, said the phrase “next steps” was more of a general expression.

“There are no specific negotiations taking place, nor are there any specific negotiations scheduled,” said the source.

“The prime minister raises it with the president every time he talks about it.”

The offices of Trudeau and Canadian Foreign Minister Chrystia Freeland declined to give more details.

Trudeau’s government strongly opposes the sanctions, which Trump said in late May he was imposing for reasons of national security. Ottawa unveiled a series of counter measures against U.S. goods as a retaliatory measure.

The dispute threatened to overshadow the signature of a new continental trade pact with the United States and Mexico last November. Although Canadian officials initially suggested Ottawa might not take part if the sanctions were still in place, Trudeau ended up signing.

The new United States-Mexico-Canada Agreement (USMCA) is designed to replace the 1994 North American Free Trade Agreement (NAFTA), which Trump had threatened to abandon unless major changes were made.

Such a move could have crippled the economies of Canada and Mexico, which both send more than 75 percent of their goods exports to the United States every month.

The statement from Trudeau’s office said the two men had discussed the importance of trade and jobs in the wake of the talks to renegotiate NAFTA.

Although Trump said on Dec. 1 he would soon give formal notice of his intention to terminate NAFTA, giving six months for lawmakers to approve the USMCA, he has so far not acted.

Industry officials say U.S. Senate Republicans asked Trump to delay immediate termination to give Congress additional time in 2019 to take up the issue.

A person close to Republican Senator Chuck Grassley, the new chair of the finance committee that oversees trade issues, said he was uneasy about terminating NAFTA given “the uncertainty it would cause for U.S. businesses and farmers and the damage that uncertainty could do.”