Bulgaria will close its air, sea and land borders to travellers coming from the United Kingdom from midnight until Jan. 31 to prevent importing a new strain of the coronavirus, the health ministry said on Sunday, Reuters reported. Earlier, the government said it was suspending flights from and to Britain until the end of January. Returning Bulgarians and people with long-term residence permits along with their family members will be allowed in the country, but will have to go into obligatory 10-day quarantine, the health ministry said in a statement. European countries began to close their doors to travellers from the United Kingdom on Sunday over concerns about a new coronavirus strain that is spreading quickly through the country.