The controversial United States travel ban introduced by the Trump administration has been expanded to include people from North Korea, Venezuela and Chad.
The White House said the restrictions follow a review of information sharing by foreign governments.
Donald Trump issued a presidential proclamation late on Sunday.
“Making America safe is my number one priority. We will not admit those into our country we cannot safely vet,” Mr Trump said.
The restrictions on Venezuelans apply only to government officials and their family members.