Authorities in the Ukrainian capital have asked residents to resume wearing face masks due to a surge in Covid cases and a health system battered by the Russian invasion.

In the past week, 2,515 coronavirus cases were registered in Kyiv, 242 people were hospitalised and 22 people died, the city hall said.

Residents should wear a mask in "public transport, in places that serves clients, and in educational facilities", it said.

Between 19 and 25 September, there were 44,137 new registered cases in Ukraine, 6,667 people were hospitalised, and 161 people died, the health ministry said.

Last Monday, Deputy Health Minister Igor Kuzin spoke of an "increase" in Covid cases and said the healthcare system was "suffering losses every day" because of the war.

"Since the beginning of the invasion, 18 facilities welcoming Covid patients were destroyed, another 15 were partially destroyed, and more than 100 are under forced occupation," Mr Kuzin said.

Mr Kuzin also said Covid curbs could be hard to implement as the country was "focusing on another enemy."

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Covid restrictions were suspended when martial law was established in Ukraine on 24 February, the day Russia invaded the country.

The peak in cases is expected between the end of September and the start of October, according to Mr Kuzin.

The World Health Organization (WHO) said at the end of August that Ukraine's health system was "badly affected but still resilient".

As winter approaches, the WHO said "the next six months could test Ukraine's health system like never before."