A privacy breach at an eastern Ontario children's aid office has resulted in a class-action lawsuit.

Family and Children's Services of Lanark, Leeds and Grenville says the suit has been filed in connection to an incident that saw the names of 285 past and present clients published online.

The cyber attack happened on April 18 and is currently under police investigation.

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The organization did not offer any details on what safety measures it has in place to protect client data, adding it cannot comment on the suit because it is before the courts.

FCS says it believes the list of names has been taken off line, adding it's in the process of trying to step up security measures on its own website.