WASHINGTON — President Donald Trump is expected to announce new restrictions on travel to the United States as his ban on visitors from six Muslim-majority countries expires Sunday, 90 days after it went into effect.

The Department of Homeland Security has recommended the president sign off on new, more targeted restrictions on foreign nationals from countries it says refuse to share information with the U.S. or haven’t taken necessary security precautions.

Trump appeared to preview his intentions as he spoke with reporters on the tarmac of a New Jersey airport Sunday, saying: “the tougher the better.”

Officials haven’t said which — or how many — countries will be affected by the new restrictions, which could take effect as soon as Sunday.

“The acting secretary has recommended actions that are tough and that are tailored, including restrictions and enhanced screening for certain countries,” said Miles Taylor, counselor to acting Homeland Security Secretary Elaine Duke.

The current ban bars citizens of Iran, Libya, Somalia, Sudan, Syria and Yemen who lack a “credible claim of a bona fide relationship with a person or entity in the United States” from entering the U.S.