About 16,000 Ohio Farm Bureau Federation members insured by Medical Mutual of Ohio have been warned some of their personal information may have been compromised. The federation and the insurer say an internet technology vendor mistakenly put an electronic file of information on an unsecured site used for file transfers. They say names, contact and Social Security numbers and insurance coverage information could have been accessed by someone without authorization, though there's no sign the data was misused. It's related to coverage from 2008 to 2010 and didn't include medical or claims details. Affected members have free access to credit monitoring resources. It's unclear how long the file was available before the error was found Feb. 11 and the site was closed. The vendor's contract has been terminated.