Saudi Arabia has banned travel from 20 countries in a bid to curb the coronavirus and prevent fast-spreading variants from reaching the kingdom, the official Saudi Press Agency (SPA) announced on Tuesday.

Diplomats, health care workers and their families are exempt from the travel order, which begins at 9 p.m. on Wednesday and includes travelers from the United Arab Emirates, Egypt, Lebanon, Turkey, the United States and the United Kingdom.

“The decision will include those travelers coming from other countries if they passed through any of the 20 banned countries 14 days preceding the request to enter the kingdom,” a source from the Interior Ministry told SPA.

Saudi Arabia has also extended its ban on Saudi citizens traveling abroad, pushing back the lifting of the restrictions from March 31 to May 17. The Interior Ministry said the decision was made after scheduled shipments of the Pfizer-BioNTech COVID-19 vaccine were delayed. The Saudi government in December first suspended commercial flights in and out of the country after a new, more contagious strain of the virus emerged in the United Kingdom and South Africa.