President Donald Trump confirmed Tuesday that his administration is working on adding countries to his controversial travel ban .

Trump told The Wall Street Journal that he is seeking to expand the ban, but refused to reveal which countries would be targeted.

The statement corroborates several recent reports about a potential update to the ban, which currently suspends immigrant and nonimmigrant visas for applicants from five majority-Muslim nations Iran, Libya, Somalia, Syria and Yemen as well as Venezuela and North Korea.

The expanded list potentially may include U.S. allies that have failed to comply with certain security measures, The Associated Press reports .

The White House did not immediately respond to HuffPosts requests for comment.