WASHINGTON — President Donald Trump criticized European automakers Friday, suggesting he could impose tariffs on imports from companies such as BMW and Mercedes unless they build more plants in the United States.

In an interview with Fox Business Network’s Maria Bartiromo, Trump said that he has rejected proposals from the European Union that would bring auto tariffs on both sides to zero.

“They have BMW, they have Mercedes, they have a lot of very good cars that come in,” Trump said of Germany. “I want them to make them here. ... If you’re going to sell them to the Americans, make them here.”

Trump’s comments come roughly a month after the Commerce Department completed an investigation into whether auto imports threaten national security and forwarded its conclusions to the White House.

The results of the report haven’t been released. But Derek Scissors, a resident scholar at the American Enterprise Institute, said he has seen a copy and that it concludes auto imports threaten national security by worsening the trade deficit.

The president has until roughly mid-May to decide what action to take, if any, in response to the report. He could impose tariffs of up to 25 percent on all auto and auto parts imports, or a just on specific items from specific countries.

The prospect of such duties has sparked strong opposition on Capitol Hill, where they have been criticized by members of Congress from both parties.