Denmark's prime minister has apologised after being filmed shopping without a mask four days after her government reintroduced mandatory face coverings in some places and on public transport, reports AFP.

The video, published on the website of the Ekstra Bladet newspaper, was taken on Friday by a passer by at a clothes shop in Copenhagen.

“It was simply an oversight after the new rules came into force,” Prime Minister Mette Frederiksen said on social networks. “I know it can happen to anyone. But ideally not me. So I obviously regret it and I want to thank you again for everything we are doing together to contain the epidemic.”