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.
At least one person was killed and 10 injured, including three children, in overnight drone attacks by Russia on Ukraine, officials said on Wednesday. Various attacks also damaged energy facilities in two regions, according to the Ukrainian president Volodymyr Zelenskyy.
Israel announced a major expansion of military operations in Gaza on Wednesday, saying large areas of the enclave would be seized and added to its security zones, accompanied by large-scale evacuation of population.
A fourth US Army soldier, who together with three others went missing in Lithuania last week when their vehicle sank in a peat bog, has been found dead, US and Lithuanian officials said on Tuesday.
The United Nations on Tuesday dismissed as "ridiculous" an assertion by Israel that there was enough food in the Gaza Strip to last for a long period of time, despite the closure of all 25 bakeries supported by the World Food Programme (WFP).