The Trump administration is planning to add seven countries – Belarus, Eritrea, Kyrgyzstan, Myanmar, Nigeria, Sudan and Tanzania – to its travel ban list, U.S. media reports said on Tuesday.

Some countries will face bans only on some visa categories, the Wall Street Journal reported. The list of countries was not final and could yet change, website Politico said.

U.S. President Donald Trump said in an interview with the Journal that he was considering adding countries to the travel ban, but declined to state which ones. Politico said an announcement was expected as early as Monday.

The move is likely to sour ties between the United States and the countries affected under the expanded ban.

Nigeria, for example, Africa’s largest economy and most populous country, is a U.S. anti-terrorism partner and has a large diaspora residing in the United States.