CLEVELAND (AP) - A city employee suspected of dumping human fecal matter into a water filtration plant has provided a DNA sample voluntarily.

Officials have not publicly identified the employee. The unspecified sample was provided Monday and is to be used to help prove whether the employee was the source of the waste.

Mayor Michael R. White's spokeswoman, Nancy Lesic, would not say whether the suspect has remained on the job. She said the DNA test might take two months to complete.

The material was found lodged against a filter in a filtration plant, one of four in a city-owned system that serves 1.5 million people in Cleveland, most of its suburbs in Cuyahoga County and outlying communities in Medina, Summit and Geauga counties.

City officials said the waste did not pose a threat to city water customers because the filtration was incomplete at that point.