Tina Reed of AnnArbor.com reports this afternoon that Washtenaw County officials are warning county residents about a suspected outbreak of E. coli O157:H7 cases among local residents. Ten cases have been reported to public health officials and other cases are being investigated, according to a release. Preliminary tests have come back positive for a toxin that is usually detected with E. coli illness. The source of the contamination has not been identified, health officials said. Those who have been sickened have mostly been young adults and at least a couple of those cases have ended up in the hospital.

Anyone who develops bloody diarrhea should seek medical attention and should report suspected E. coli illness to Washtenaw County Public Health at 734-544-6700.