US Commerce Secretary Howard Lutnick said on Sunday that tariffs on Canada and Mexico will go into effect on Tuesday, but that President Donald Trump will determine whether to stick with the planned 25 percent level.

"That is a fluid situation," Lutnick told the Fox News program "Sunday Morning Futures."

"There are going to be tariffs on Tuesday on Mexico and Canada. Exactly what they are, we're going to leave that for the president and his team to negotiate."

READ MORE: Trump says tariffs on Mexico, Canada to 'go forward'

Lutnick's comments were the first indication from Trump's administration that it may not impose the full threatened 25 percent tariffs on all goods from Mexico and non-energy imports from Canada.

He said the two countries have "done a reasonable job" securing their borders with the United States, though the deadly drug fentanyl continues to flow into the country.

READ MORE: Trump set to start tariffs on China, Canada and Mexico

Trump sowed confusion last week when he mentioned a possible April 2 deadline in connection with tariffs on Canada and Mexico.