A measles outbreak has been declared after two new cases were recorded in south-east Wales.

Public Health Wales said there had been four confirmed cases in total, all of whom were children “in the Gwent area”.

The cases were linked after one of the four was in the children’s emergency assessment unit at The Grange University Hospital in Cwmbran, Torfaen, on 21 March, the agency said.

The children were receiving appropriate care and contacts had been identified.

“Measles is a highly infectious disease and cases have been rising across the UK and Europe in recent months, so this development is not unexpected,” Beverley Griggs, consultant in health protection for PHW said.