A child who attends Tir na n-Og nursery in Bangor and an adult with links to it have been diagnosed with E. coli, a month after an outbreak at another nursery on Anglesey.

Testing for the infection is being offered to children at nursery and the premises have closed. Four people with symptoms who are close contacts of those who have been ill are being checked by Public Health Wales. Nursery staff and those in at risk groups, who are close contacts of people who are unwell, will be tested, while parents have been asked to collect stool samples from their children as soon as possible.

Public health officers and environmental health teams from Betsi Cadwaladr University Health Board and Anglesey, Gwynedd and Conwy councils are also investigating a possible link with an outbreak at a nursery in Amlwch, Anglesey, in October.

Dr Chris Whiteside, consultant in communicable disease control for Public Health Wales, said "We have two confirmed cases at present. Specialised laboratory tests will give an indication of whether they are the same strain as the Amlwch outbreak. However, it will take some time before these results are available.

The owners of Tri Ceffyl Bach Nursery in Amlwch closed it down indefinitely following the E. coli outbreak.