Chinese media report that children's hospitals in parts of the country are overwhelmed with sick children.

The World Health Organization (WHO) has asked China for more information on “clusters of undiagnosed pneumonia” reportedly spreading among children in the north of the country.

Non-state media reports say paediatric hospitals in parts of China are overwhelmed with sick children.

Chinese authorities have attributed a spike in flu-like illnesses this winter to the lifting of Covid measures.

The WHO is urging people in China to take measures to reduce transmission.

In a statement, the UN health agency says it wants more information on reports in the media and from ProMed - a global outbreak surveillance system - of “clusters of undiagnosed pneumonia in children in northern China”.