The countries added to the list are Burkina Faso, Mali, Niger, South Sudan and Syria. People with Palestinian-Authority-issued travel documents are also fully restricted from U.S. travel.

President Donald Trump revived his travel ban, a key component of his first administration, in June of this year.Andrew Caballero-Reynolds / AFP via Getty Images

The Trump administration is expanding its travel ban to include five more countries and impose new limits on others.

This move Tuesday is part of ongoing efforts to tighten U.S. entry standards for travel and immigration. The decision follows the arrest of an Afghan national suspect in the shooting of two National Guard troops over Thanksgiving weekend.

In June, President Donald Trump announced that citizens of 12 countries would be banned from visiting the United States and those from seven others would face restrictions. The decision resurrected a hallmark policy of his first term.

At the time the ban included Afghanistan, Myanmar, Chad, the Republic of Congo, Equatorial Guinea, Eritrea, Haiti, Iran, Libya, Somalia, Sudan and Yemen and heightened restrictions on visitors from Burundi, Cuba, Laos, Sierra Leone, Togo, Turkmenistan and Venezuela.

On Tuesday, the Republican administration announced it was expanding the list of countries whose citizens are banned from entering the U.S. to Burkina Faso, Mali, Niger, South Sudan and Syria. The administration also fully restricted travel on people with Palestinian-Authority-issued travel documents.

An additional 15 countries are also being added to the list of countries facing partial restrictions: Angola, Antigua and Barbuda, Benin, Côte d`Ivoire, Dominica, Gabon, Gambia, Malawi, Mauritania, Nigeria, Senegal, Tanzania, Tonga, Zambia and Zimbabwe.

The Trump administration said in its announcement of the expanded travel ban that many of the countries from which it was restricting travel had "widespread corruption, fraudulent or unreliable civil documents and criminal records" that made it difficult to vet their citizens for travel to the U.S. It also said some countries had high rates of people overstaying their visas, refused to take back their citizens who the U.S. wished to deport or had a "general lack of stability and government control," which made vetting difficult.

"The restrictions and limitations imposed by the Proclamation are necessary to prevent the entry of foreign nationals about whom the United States lacks sufficient information to assess the risks they pose, garner cooperation from foreign governments, enforce our immigration laws, and advance other important foreign policy, national security, and counterterrorism objectives," reads the White House proclamation announcing the changes.

The Afghan man accused of shooting the two National Guard troops near the White House has pleaded not guilty to murder and assault charges.