The Trump administration's controversial travel ban has now been expanded to include Nigeria and five other countries.
Starting February 21, immigration restrictions will be imposed on Eritrea, Tanzania, Sudan, Kyrgyzstan and Myanmar, with US officials explaining that they failed to meet security standards.
Belarus, which had been under consideration for inclusion, did not make it to the list as it took steps to remedy deficiencies in recent months.
Temporary visas for tourists, business people, students and workers from those nations will remain unaffected.
The US will also stop issuing "diversity visas" to nationals of Sudan and Tanzania.
Critics had earlier criticised US President Donald Trump's 2017 travel ban on Iran, Libya, Somalia, Syria, Yemen, North Korea and Venezuela as discriminatory.
North Korean leader Kim Jong Un told Russia's top diplomat his country was ready to "unconditionally support" Moscow's every effort to resolve the conflict in Ukraine, state media reported on Sunday, as the two countries held high-level strategic talks.
A preliminary report depicted confusion in the cockpit shortly before an Air India jetliner crashed, killing 260 people last month, after the plane's engine fuel cutoff switches almost simultaneously flipped, starving the engines of fuel.
US President Donald Trump defended the state and federal response to deadly flash flooding in Texas on Friday as he visited the stricken Hill Country region, where at least 120 people, including dozens of children, perished a week ago.
Russia pounded Ukraine with hundreds of drones and dozens of missiles on Saturday, in the fourth major attack this month, targeting western cities and killing at least two people in Chernivtsi on the border with Romania.