The Trump administration is getting ready to add countries to its list of six nations whose citizens are banned from traveling to the U.S. due to national security concerns, according to a report Friday morning.

The Department of Homeland Security proposal would go into effect Sunday, the expiration of the 90-day travel ban against select countries in the Middle East and North Africa.

DHS recently flagged 17 unspecified nations that have failed to meet U.S. standards for screening travelers and ignored other government mandates.

About half of those countries made changes to be more in line with U.S. security standards, but the remaining half did not, the Wall Street Journal reported.

Those remaining eight or nine countries will see different types of visa bans and other restrictions, not necessarily a flat-out ban on all travel.

One official familiar with the pending change said the new system creates "tailored sanctions commensurate with their deficiencies."

The eight or nine countries that will be affected will see the restrictions lifted only when they fully cooperate with all U.S. policies.

President Trump will make the final decision on the proposal, but the plan is scheduled to be announced Sunday. Following this week's terror attack in London, Trump had called for a "far larger, tougher and more specific" travel ban.