Public health officials say a child who lives on Mercer Island likely has E. coli.

The state lab has yet to confirm the case and King public health officials say it's not possible to say whether there is a link between the child's illness and problems with the Mercer Island water system.

King County has about 20 to 30 cases of E. coli each year. Health officials say the source of most cases is never identified.

Officials are advising residents of the Seattle suburb to boil their water after some city water tested positive for E. coli. Restaurants on the island are closed and officials are still looking for the source of the problem.

Health officials did not find any E. coli in water tests conducted Friday and Saturday.

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